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Postby eduardomorales5 » Thu Jan 23, 2020 5:41 pm

Why does temperature affect the K? Does increasing heat for an exothermic reaction shift it to the reactants or products?

Bilal Pandit 1J
Posts: 98
Joined: Wed Sep 11, 2019 12:16 am

Re: Temperature

Postby Bilal Pandit 1J » Thu Jan 23, 2020 5:43 pm

For exothermic reaction, increasing the temperature will decrease the K, while for endothermic, increasing the temperature will increase the k

Jaklin Astvatsatryan
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Joined: Wed Sep 18, 2019 12:18 am

Re: Temperature

Postby Jaklin Astvatsatryan » Thu Jan 23, 2020 6:03 pm

For an exothermic reaction (ΔH is negative), K decreases with an increase in temperature. Increasing the temperature causes the equilibrium to shift to the left.

For an endothermic reaction (ΔH is positive), K increases with an increase temperature.

Madelyn Romberg 1H
Posts: 102
Joined: Tue Oct 02, 2018 12:16 am

Re: Temperature

Postby Madelyn Romberg 1H » Thu Jan 23, 2020 6:25 pm

Temperature can be thought of as a reactant. If adding heat to a reaction, it will favor whichever direction has the positive change in H. This is because forming more of the "energy rich" molecule will harness more of the heat to minimize the net change of temperature of the environment. This is Le Chatelier's principle that reactions will try to minimize change when induced under some sort of stress.

Gurmukhi Bevli 4G
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Joined: Wed Nov 14, 2018 12:20 am

Re: Temperature

Postby Gurmukhi Bevli 4G » Fri Jan 24, 2020 12:00 am

Increasing temperature decreases k for an exothermic reaction (which releases energy), and increasing temperature increases k for an endothermic reaction (which requires energy).

Jocelyn Thorp 1A
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Re: Temperature

Postby Jocelyn Thorp 1A » Fri Jan 24, 2020 1:39 pm

heat can be considered a product (in an exothermic reax) or a reactant (in an endothermic reax), and thus adding or removing heat can cause the reaction to shift

Emil Velasco 1H
Posts: 96
Joined: Wed Nov 21, 2018 12:19 am

Re: Temperature

Postby Emil Velasco 1H » Fri Jan 24, 2020 9:44 pm

Increasing and decreasing temperature changes the value of K because it acts as either a product or reactant (exothermic or endothermic respectively)

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