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Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry PDF Download

Removal / Addition of inert gas at equilibrium

At constant volume:

Addition / removal of inert gas have no effect at equilibrium at constant volume.

At constant pressure:

If inert gas is added then to maintain the pressure constant, volume is increase.

Hence equilibrium will shift in the direction in which larger no. of moles of gas is formed.

(i)         Δng> 0

            Reaction will shift in forward direction.

(ii)        Δng< 0

            Reaction will shift in backward direction.

(iii)       Δng = 0, No effect


Simultaneous Equilibrium


Series Equilibrium:

When product of Initial reaction acts as reactants in further reactions.

A(S)    Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical ChemistryRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry      B(g) + C(g)

                        Pi–P     Pi                   Kp1  Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry  = Pi(Pi – P)

B(g) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry    Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry       D(g) + E(g)

Pi – P               P          P                     Kp2    Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry  = Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical ChemistryRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry

 

Parallel Equilibrium:

A(S) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical ChemistryRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry B(g) + C(g)             

                P1+P2     P1                          Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry  = (P1 + P2) P1

X(S) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical ChemistryRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical ChemistryB(g) + D(g)

                P1+P2     P2                          Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry  = P2(P1 + P2)

When two different reactions gives the same products, called parallel equilibrium.

Example:        NH4I(s) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry  Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry    NH3(g) + HI(g)                       KP1 = 16

                        2 HI(g) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry    Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry   H2(g) + I2 (g)

Pressure of Hydrogen at equilibrium is 1 atm. Calculate the value of KP2.

Solution:         NH4I(s) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical ChemistryRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry NH3(g) + HI(g)

                                             Pi – 2        Pi

                        2HI(g) Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry  Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry H2(g) + I2(g)

                        Pi – 2             1            1

Kp1 = (Pi – 2) (Pi)

Pi = 5.12

KP2 = Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical ChemistryRemoval / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry= 0.103

The document Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium | Physical Chemistry is a part of the Chemistry Course Physical Chemistry.
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FAQs on Removal / Addition Of Inert Gas At Equilibrium - Chemical Equilibrium - Physical Chemistry

1. What is the role of inert gas in a chemical equilibrium?
Ans. Inert gases, also known as noble gases, do not react with other substances and therefore do not affect the equilibrium position of a chemical reaction. Their main role is to increase the total pressure of the system without changing the concentrations of the reactants and products, according to Le Chatelier's principle.
2. Can the addition of an inert gas shift the equilibrium position of a reaction?
Ans. No, the addition of an inert gas does not shift the equilibrium position of a reaction. It only increases the total pressure of the system, but the concentrations of the reactants and products remain unchanged. The equilibrium position is determined solely by the relative concentrations of the reactants and products.
3. How does the removal of an inert gas affect the equilibrium of a reaction?
Ans. The removal of an inert gas from a system does not have any effect on the equilibrium position of a reaction. Since inert gases do not participate in the reaction, their removal does not alter the concentrations of the reactants and products. The equilibrium is only influenced by changes in the concentrations of the reacting species.
4. Can the addition of an inert gas affect the rate of a chemical reaction at equilibrium?
Ans. No, the addition of an inert gas does not affect the rate of a chemical reaction at equilibrium. Inert gases do not participate in the reaction, so they do not influence the reaction rate. The rate of a reaction at equilibrium is determined by the rate of the forward and reverse reactions, which are not affected by the presence of inert gases.
5. Are there any situations where the addition or removal of an inert gas can affect the equilibrium of a reaction?
Ans. In general, the addition or removal of an inert gas does not affect the equilibrium of a reaction. However, if the reaction involves gaseous reactants or products, changes in the total pressure of the system due to the addition or removal of an inert gas can indirectly affect the equilibrium position. This is because changes in pressure can alter the concentrations of the reacting species, thus influencing the equilibrium.
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