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Change in Temperature

Posted: Tue Jan 28, 2020 10:47 am
by Michelle N - 2C
So I’m starting to understand a little bit better about endothermic and exothermic reactions, but I wanted a little clarification here? As temperature increases, so does the equilibrium constant? Sorry, just wanted to have a clear understanding if anything.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 10:58 am
by Michael Nguyen 1E
Yes, that's correct. When the temperature of a system changes, its equilibrium constant will also change.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 11:18 am
by Jessica Esparza 2H
The equilibrium constant will only rise if your reaction is endothermic and you add heat. If you add heat and it's exothermic the equilibrium constant will decrease (this is because your reverse reaction is endothermic and so adding heat will cause a reaction to proceed in reverse direction.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 11:51 am
by Katie Bart 1I
Also, a change in temperature is the only factor that will change the K value for a reaction.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 12:15 pm
by Jaci Glassick 2G
The equilibrium constant will change with temperature. If the reaction is exothermic (releases heat), your constant will decrease. If the reaction is endothermic (absorbs heat), your constant will increase.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 1:07 pm
by Jialun Chen 4F
Correct! Equilibrium constants change as the alteration of the temperature inside the system occurs.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 1:54 pm
by Trent Yamamoto 2J
Temperature is the only condition that will alter the K value. In an exothermic reaction, where heat is released, your constant will decrease. If the reaction is endothermic, where heat is absorbed, your constant will increase.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 2:01 pm
by Oduwole 1E
Michelle N - 2C wrote:So I’m starting to understand a little bit better about endothermic and exothermic reactions, but I wanted a little clarification here? As temperature increases, so does the equilibrium constant? Sorry, just wanted to have a clear understanding if anything.


Yeah, as temperature increases, so will the equilibrium constant.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 2:27 pm
by 105335337
Yes, temperature is a factor that changes the equilibrium constant. For example, if temperature increases in a reaction, the equilibrium constant will change.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 2:39 pm
by Vicki Liu 2L
To figure out the reasoning behind the change in equilibrium constant, figure out if heat is a product (exothermic reaction) or a reactant (endothermic reaction). When heat is added, the reaction will shift towards the opposite side. Then, based on whether the reactant or product side is favored, you can determine whether the equilibrium constant increases or decreases.

Re: Change in Temperature

Posted: Tue Jan 28, 2020 8:04 pm
by Luc Zelissen 1K
You can think of this in another way: imagine putting heat as a reactant or product based on if the reaction is endothermic or exothermic. Then you can use le chatelier's principle to determine how K will change. For an exothermic reaction, the heat is on the products side because it is released. If you add heat you will then in turn favor the reverse reaction, lowering K and on the flip side, if you decrease heat the reaction will favor the products side and K will increase. If the reaction is endothermic then the heat sits on the reactant side. If you increase heat you will favor the forward reaction, increasing K, and if you lower heat then you favor the reverse reaction, lowering K.