Effect of Temperature on Chemical Equilibrium

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SUMMARY

The discussion centers on the effect of temperature on chemical equilibrium, specifically addressing why the equilibrium constant (K) changes with temperature but remains constant with changes in concentration and pressure. Participants reference Le Chatelier's principle and the Arrhenius equation to explain that the rate constant is influenced by temperature due to the increased energy available to reactants. A foundational understanding of chemical thermodynamics is necessary to fully grasp the derivation of the equilibrium constant and its temperature dependence.

PREREQUISITES
  • Understanding of Le Chatelier's principle
  • Familiarity with the Arrhenius equation
  • Basic knowledge of chemical equilibrium concepts
  • Introduction to chemical thermodynamics
NEXT STEPS
  • Study the derivation of the equilibrium constant in chemical thermodynamics
  • Learn about the Arrhenius equation and its implications on reaction rates
  • Explore the relationship between temperature and reaction kinetics
  • Investigate the effects of pressure and concentration on equilibrium systems
USEFUL FOR

Students of chemistry, particularly those in introductory courses on chemical thermodynamics and equilibrium, as well as educators seeking to clarify the relationship between temperature and equilibrium constants.

Karan Punjabi
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Guys, I'm studying about Le-chatelier's principle and the topic is effect of temperature. I just went through it and found a difficulty that why K values changes i.e why the equilibrium constant changes as in other effects like changes in concentration, pressure,etc the K values remains constant.
 
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Hi Karan:

I looked at the Wikipedia article
https://en.wikipedia.org/wiki/Le_Chatelier's_principle
and I found no equations involving a variable "K". So, I assume that by "K value" you mean temperature.

I can make some wild guesses about the problem you are asking about, but in order to help you I need to see the context of the question, with quoted material for the source if possible.

Regards,
Buzz
 
In the simplest model the rate constant is given by the Arrhenius equation, see https://en.wikipedia.org/wiki/Reaction_rate_constant

The higher the temperature, the easier it is for the reactants to overcome the reaction barrier. No such dependence of the rate constant exists for pressure and concentration. That said, they still have to be considered in Le Châtelier's principle (although pressure only for gases).
 
You are asking why the equilibrium constant is a function of temperature, but not pressure or concentration, correct?
 
Chestermiller said:
You are asking why the equilibrium constant is a function of temperature, but not pressure or concentration, correct?
I understood you Drclaud. And I want the same thing mentioned above that is why Equilibrium constant is a function of temperature . why it doesn't varies with changes in concentration and pressure
 
Karan Punjabi said:
I understood you Drclaud. And I want the same thing mentioned above that is why Equilibrium constant is a function of temperature . why it doesn't varies with changes in concentration and pressure
I take that as a yes. Have you had a course in chemical thermodynamics yet?
 
Chestermiller said:
I take that as a yes. Have you had a course in chemical thermodynamics yet?
No, I'm in FYJC so no knowledge of thermodynamics
 
Karan Punjabi said:
No, I'm in FYJC so no knowledge of thermodynamics
Well, when you take chemical thermodynamics, you will learn about the derivation of the equilibrium constant and why it is a function of temperature alone. The coursework leading up to this is just too lengthy to describe here.

chet
 
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Chestermiller said:
Well, when you take chemical thermodynamics, you will learn about the derivation of the equilibrium constant and why it is a function of temperature alone. The coursework leading up to this is just too lengthy to describe here.

chet
Ohk thanks for the help☺
 

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