Factors Affecting K

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Factors Affecting K

Postby ashwathinair » Sun Jan 12, 2020 12:41 pm

What factors change a K value of an equilibrium reaction (other than temperature), and why?

Ritu Gaikwad 2E
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Joined: Thu Jul 11, 2019 12:16 am

Re: Factors Affecting K

Postby Ritu Gaikwad 2E » Sun Jan 12, 2020 1:05 pm

The only external factors that impact K would be temperature because that can impact how much of the reactant is produced or product is created as well. Other factors such as the change in pressure or volume would not affect the K value because the system would adjust concentrations of products and reactants in the same specified ratio.

Aarja Pavade 1H
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Re: Factors Affecting K

Postby Aarja Pavade 1H » Sun Jan 12, 2020 1:27 pm

Furthermore, the change in concentration does not change K as the chemical reaction at equilibrium represents a fixed product to reactant ratio. The chemical reactions adjust so as to minimize the effect of changes. This is LeChatlier's Principle. K, however, is dependent on the temperature which is why we are always given a reaction at a specific temperature.

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Re: Factors Affecting K

Postby PranaviKolla2B » Sun Jan 12, 2020 2:30 pm

What is the difference between Kc and Kp?

Eugene Chung 3F
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Re: Factors Affecting K

Postby Eugene Chung 3F » Sun Jan 12, 2020 2:33 pm

the c in Kc represents concentration and p partial pressure.

Helen Struble 2F
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Re: Factors Affecting K

Postby Helen Struble 2F » Sun Jan 12, 2020 3:21 pm

For a reaction in solution, both temperature and system pressure would affect the equilibrium constant. This is because both of these affect the chemical activity of a species. Since concentration is just an approximation of chemical activity, anything that changes chemical activity will change the equilibrium constant.

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