Effects on Equilibrium constants


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nikisepanj
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Effects on Equilibrium constants

Postby nikisepanj » Tue Nov 17, 2015 11:09 pm

how does an increase in temperature affect the equilibrium constant?

Tiffany Chen 2E
Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

Re: Effects on Equilibrium constants

Postby Tiffany Chen 2E » Tue Nov 17, 2015 11:23 pm

An increase in temperature will cause an endothermic reaction to shift right and favor the product. This would create more product to make for a greater numerator in the equilibrium constant, thus, increasing the equilibrium constant. Likewise, in a forward exothermic reaction, increasing the temperature will cause the reactants to be favored and decrease the value of the equilibrium constant.

Ritika Saranath 3I
Posts: 24
Joined: Fri Sep 25, 2015 3:00 am

Re: Effects on Equilibrium constants

Postby Ritika Saranath 3I » Tue Dec 01, 2015 12:56 pm

Thinking of "heat" as a reactant/product can make it easier to remember which direction an endothermic/exothermic reaction proceeds due to an increase/decrease in temperature.

In an endothermic reaction, heat is absorbed; therefore, heat can be thought of as a reactant.
Ex. A + B + heat --> C
Just as with any other reactant, if it is reduced, the reaction will proceed to the left, and if it is increased, the reaction will proceed to the right.

In an exothermic reaction, heat is released; therefore, heat can be thought of as a product.
Ex. A + B --> C + heat
So, if heat is reduced, the reaction will proceed to the right, and if it is increased, the reaction will proceed to the left.


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