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If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.
Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.
Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.
Solid (lower volume)  Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomes 
high.
(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).
KCI + aq KCl(aq) – heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.
KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.
Effect of temperature : Le-Chatelier's principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Van't Hoff equation shows the dependence of equilibrium constant K on temperature as:
Q.
The plot of log K against 1 -- is a straight line with positive slope (K being the equilibrium constant of a reaction), which of the following is then correct ?               
  • a)
      The reaction is endothermic in nature               
  • b)
      The reaction will be exothermic in nature               
  • c)
    The reaction goes to farther extent on raising the temperature               
  • d)
      None of these
Correct answer is option 'B'. Can you explain this answer?
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If a systemat equilibrium is subjected to a change of any one of the f...
Since the slope of the straight line graph between log and 1/2
is positive, ΔHreaction would be negative, i.e., 
the forward reaction would be exothermic.
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The rate of chemical reaction at a particular temperature is proportional to the product of the molar concentration of reactants with each concentration term raised to the power equal to the number of molecules of the respective reactant taking part in the reaction. aA + bB products, rate of reaction a [Aka [Bib = k [Aka [Bib, where k is the rate constant of the reaction.EQUILIBRIUM CONSTANT (k) For a general reaction aA + bB = cC + dD, forward rate rf = kf [A]a [B]b, backward rate rb = kb [Cicpyi ,concentrations of reactants products at equilibrium are related bywhere all theconcentrations are expressed in mole/liter.In the expression of equilibrium constant those components are kept whose concentration changes with time.If equilibrium is estabilished by taking all the components in the reaction then to predict the direction of reactions we calculate the reaction quotient (Q).The values of expression at any time during reaction is called reaction quotient if Q Kc reaction proceed in backward direction until equilibrium in reached if Q Kc reaction will proceed in forward direction until equilibrium is established if Q = KC Reaction is at equilibriumQ.When C,H5OH and CH3COOH are mixed in equivalent proportion equilibrium is reached when 2/3 of acid and alcohol are used. How much ester will be present when 2 moles of acid were to react with 2 moles of alcohol? .

Not all chemical reactions proceed to a stage at which the concentrations of the reactants become vanishingly small. Here we consider the kinetics of such reactions.Let a reaction be represented in general terms by the schemewhere k., and k_., represent the rate constants for the forwards and reverse reactions, respectively. The equilibrium constant for this reaction may be written asK = [B] /[A] = K1/K1 --(1)where the subscript 00 refers to a time t, sufficiently long to establish equilibrium at the given temperature. The initial concentration of species A is [A]O, and that of B is [B]O . After a time t, let the concentration of species A be [A/t and that of B be [Bat. The total rate of change of [At is given byd[A]t/dt= - K1[A]t + k-1[B]tIf, as is usual, [B]O is initially zero, it follows from a mass balance that at any time t,[Bat = [A]0 - [A]t, whenced[A]t/dt = K1[A]t + k-1([A]O - [A]t)ord[A]t/dt = (K1 + k-1)For the reaction (having both 1ts order reactions), the concentration as a function of time are given for a certain experimental run along with a tangent to the graph at the origin. The ratio of the magnitude of the slopes of the graph of [A/ and [C/ at the origin would be

The rate of chemical reaction at a particular temperature is proportional to the product of the molar concentration of reactants with each concentration term raised to the power equal to the number of molecules of the respective reactant taking part in the reaction. aA + bB products, rate of reaction a [Aka [Bib = k [Aka [Bib, where k is the rate constant of the reaction.EQUILIBRIUM CONSTANT (k) For a general reaction aA + bB = cC + dD, forward rate rf = kf [A]a [B]b, backward rate rb = kb [Cicpyi ,concentrations of reactants products at equilibrium are related bywhere all theconcentrations are expressed in mole/liter.In the expression of equilibrium constant those components are kept whose concentration changes with time.If equilibrium is estabilished by taking all the components in the reaction then to predict the direction of reactions we calculate the reaction quotient (Q).The values of expression at any time during reaction is called reaction quotient if Q Kc reaction proceed in backward direction until equilibrium in reached if Q Kc reaction will proceed in forward direction until equilibrium is established if Q = KC Reaction is at equilibriumq.Above homogeneous reaction is carried out in a 2 litre container at a particular temperature by taking 1 mole each of A, B, C and D respectively. If Kc for the reaction is then equilibrium concentration of C is

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If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer?
Question Description
If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer?.
Solutions for If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE. Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
Here you can find the meaning of If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice If a systemat equilibrium is subjected to a change of any one of the factors such as concentration, pressure temperature, the system adjusts itself in such a way as to (Nulify) the effect of that change.Change of pressure : If a system in equilibrium consists of gases, then the concentrations of all the components can be altered by changing the pressure. When the pressure on the system is increased, the volume decreases proportionately. The total number of moles per unit volume will now be more and the equilibirum will shift in the direction in which there is decrease in number of moles ice., towards the direction in which there is decrease in volume.Effect of pressure on melting point : There are two types of solids : (a) Solids whose volume decreases on melting, egg., ice, diamond, carborundum, magnesium nitride and quartz Solid (higher volume) Liquid (lower volume) Them process of melting is facilitated at high pressure, thus melting point is lowered. .(b) Solids whose volume increase on melting, e.g., Fe, Cu, Ag, Au, etc.Solid (lower volume) Liquid (higher volume) In this case the process of melting become difficult at high pressure; thus melting point becomeshigh.(c) Solubility of substances : When solid substance are dissolved in water, either heat is evolved (exothermic) or heat is absorbed (endothermic).KCI + aq KCl(aq) heat In such cases, solubility increase with increase in temperature. Consider the case of KOH; when this is dissolved, heat is evolved.KOH + aq KOH(aq) + heat In such cases, solubility decrease with increase in temperature. (d) Solubility of gases in liquids : When a gas dissolves in liquid, there is decrease in volume. Thus, increase of pressure will favour the dissolution of gas in liquid.Effect of temperature : Le-Chateliers principle predicts a system at equilibrium will tend to shift in the endothermic direction when temperature is raised, for then energy is absorbed as heat and the rise in temperature is opposed. Conversely, an equilibrium will shift in the exothermic direction if the temperature is lowered, for then that energy is released and the reduction in temperature is opposed. Vant Hoff equation shows the dependence of equilibrium constant K on temperature as:Q.The plot of log K against 1 -- is a straight line with positive slope (K beingthe equilibrium constant of a reaction), which of the following is thencorrect ?a) The reaction is endothermic in natureb) The reaction will be exothermic in naturec)The reaction goes to farther extent on raising the temperatured) None of theseCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice JEE tests.
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