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Rate of a reaction can be expressed by Arrhenius equation as k = Ae-EalRT. In this equation, Ea represents.
- a)the energy above which all the colliding molecules will react
- b)the energy below which colliding molecules will not react
- c)the total energy of the reacting molecules at a temperature T
- d)the fraction of molecules with energy greater than the activation energy of the reaction
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Rate of a reaction can be expressed by Arrhenius equation as k = Ae-Ea...
Ea (activation energy) is the energy required to activate the reactant so that they may collide and give the final product. Below point B, the reactants will not react at all.
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Rate of a reaction can be expressed by Arrhenius equation as k = Ae-Ea...
Rate of Reaction and the Arrhenius Equation
The rate of a chemical reaction is a measure of how quickly reactants are consumed and products are formed. It is usually expressed as the change in concentration of a reactant or product per unit time. The rate of a reaction depends on various factors, including temperature, concentration of reactants, and the presence of catalysts.
The Arrhenius equation, developed by Svante Arrhenius in 1889, relates the rate constant (k) of a reaction to the temperature (T) and the activation energy (Ea) of the reaction. The equation is given as:
k = Ae^(-Ea/RT)
Where:
- k is the rate constant
- A is the pre-exponential factor or frequency factor
- Ea is the activation energy
- R is the gas constant
- T is the temperature
Explanation of the Options
a) The energy above which all the colliding molecules will react: This option is incorrect. The activation energy represents the minimum energy required for a reaction to occur, not the maximum energy at which all molecules will react.
b) The energy below which colliding molecules will not react: This option is correct. The activation energy (Ea) represents the minimum energy threshold that colliding molecules must possess in order to undergo a reaction. If the energy of the colliding molecules is below the activation energy, the reaction will not occur.
c) The total energy of the reacting molecules at a temperature T: This option is incorrect. The total energy of the reacting molecules at a given temperature is not represented by the activation energy. The activation energy only represents the minimum energy barrier required for the reaction to proceed.
d) The fraction of molecules with energy greater than the activation energy of the reaction: This option is incorrect. The activation energy does not represent the fraction of molecules with energy greater than the activation energy. It is a specific energy value that molecules must possess in order to overcome the energy barrier and react.
Conclusion
In conclusion, the correct answer is option 'b'. The activation energy (Ea) represents the energy below which colliding molecules will not react. It is the minimum energy threshold that must be surpassed for a reaction to occur. The Arrhenius equation relates the rate constant of a reaction to the temperature and activation energy, providing a mathematical representation of the relationship between these variables.
The rate of a chemical reaction is a measure of how quickly reactants are consumed and products are formed. It is usually expressed as the change in concentration of a reactant or product per unit time. The rate of a reaction depends on various factors, including temperature, concentration of reactants, and the presence of catalysts.
The Arrhenius equation, developed by Svante Arrhenius in 1889, relates the rate constant (k) of a reaction to the temperature (T) and the activation energy (Ea) of the reaction. The equation is given as:
k = Ae^(-Ea/RT)
Where:
- k is the rate constant
- A is the pre-exponential factor or frequency factor
- Ea is the activation energy
- R is the gas constant
- T is the temperature
Explanation of the Options
a) The energy above which all the colliding molecules will react: This option is incorrect. The activation energy represents the minimum energy required for a reaction to occur, not the maximum energy at which all molecules will react.
b) The energy below which colliding molecules will not react: This option is correct. The activation energy (Ea) represents the minimum energy threshold that colliding molecules must possess in order to undergo a reaction. If the energy of the colliding molecules is below the activation energy, the reaction will not occur.
c) The total energy of the reacting molecules at a temperature T: This option is incorrect. The total energy of the reacting molecules at a given temperature is not represented by the activation energy. The activation energy only represents the minimum energy barrier required for the reaction to proceed.
d) The fraction of molecules with energy greater than the activation energy of the reaction: This option is incorrect. The activation energy does not represent the fraction of molecules with energy greater than the activation energy. It is a specific energy value that molecules must possess in order to overcome the energy barrier and react.
Conclusion
In conclusion, the correct answer is option 'b'. The activation energy (Ea) represents the energy below which colliding molecules will not react. It is the minimum energy threshold that must be surpassed for a reaction to occur. The Arrhenius equation relates the rate constant of a reaction to the temperature and activation energy, providing a mathematical representation of the relationship between these variables.
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Rate of a reaction can be expressed by Arrhenius equation as k = Ae-EalRT. In this equation, Ea represents.a)the energy above which all the colliding molecules will reactb)the energy below which colliding molecules will not reactc)the total energy of the reacting molecules at a temperature Td)the fraction of molecules with energy greater than the activation energy of the reactionCorrect answer is option 'B'. Can you explain this answer?
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Rate of a reaction can be expressed by Arrhenius equation as k = Ae-EalRT. In this equation, Ea represents.a)the energy above which all the colliding molecules will reactb)the energy below which colliding molecules will not reactc)the total energy of the reacting molecules at a temperature Td)the fraction of molecules with energy greater than the activation energy of the reactionCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Rate of a reaction can be expressed by Arrhenius equation as k = Ae-EalRT. In this equation, Ea represents.a)the energy above which all the colliding molecules will reactb)the energy below which colliding molecules will not reactc)the total energy of the reacting molecules at a temperature Td)the fraction of molecules with energy greater than the activation energy of the reactionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Rate of a reaction can be expressed by Arrhenius equation as k = Ae-EalRT. In this equation, Ea represents.a)the energy above which all the colliding molecules will reactb)the energy below which colliding molecules will not reactc)the total energy of the reacting molecules at a temperature Td)the fraction of molecules with energy greater than the activation energy of the reactionCorrect answer is option 'B'. Can you explain this answer?.
Rate of a reaction can be expressed by Arrhenius equation as k = Ae-EalRT. In this equation, Ea represents.a)the energy above which all the colliding molecules will reactb)the energy below which colliding molecules will not reactc)the total energy of the reacting molecules at a temperature Td)the fraction of molecules with energy greater than the activation energy of the reactionCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Rate of a reaction can be expressed by Arrhenius equation as k = Ae-EalRT. In this equation, Ea represents.a)the energy above which all the colliding molecules will reactb)the energy below which colliding molecules will not reactc)the total energy of the reacting molecules at a temperature Td)the fraction of molecules with energy greater than the activation energy of the reactionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Rate of a reaction can be expressed by Arrhenius equation as k = Ae-EalRT. In this equation, Ea represents.a)the energy above which all the colliding molecules will reactb)the energy below which colliding molecules will not reactc)the total energy of the reacting molecules at a temperature Td)the fraction of molecules with energy greater than the activation energy of the reactionCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Rate of a reaction can be expressed by Arrhenius equation as k = Ae-EalRT. In this equation, Ea represents.a)the energy above which all the colliding molecules will reactb)the energy below which colliding molecules will not reactc)the total energy of the reacting molecules at a temperature Td)the fraction of molecules with energy greater than the activation energy of the reactionCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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