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Endothermic Reaction

Posted: Wed Jan 16, 2019 9:18 pm
by Emma Randolph 1J
If a reaction is endothermic and you added heat, would the Kw be bigger or smaller and why? I'm a bit confused.

Re: Endothermic Reaction

Posted: Wed Jan 16, 2019 10:09 pm
by Samantha Ito 2E
If a reaction is endothermic, then heat is absorbed in the reaction. So if there is an increase in the temperature, the reaction will shift towards the products. If there is an increase in products, then the Kc value will increase.

Re: Endothermic Reaction

Posted: Wed Jan 16, 2019 10:12 pm
by MaanasO 1A
Hi Emma!

So I'm assuming you mean just K when you mention Kw. Since endothermic reactions require heat, adding heat will shift the reaction to the products. K will change because thermodynamics (we'll learn this later).

Hope that helps!

Re: Endothermic Reaction

Posted: Wed Jan 16, 2019 10:41 pm
by Felicia1E
That is kinda confusing, huh. Normally Kw will not change unless temperature changes, so in the case of 25 degrees C Kw is 1.00 x 10^-14 but when it is 50 degrees C Kw is 5.48 x 10^-14. I'm not sure about thinking about Kw in terms of adding heat an the reaction being endothermic or not, but for sure Kw will change when the temperature around it changes.

Re: Endothermic Reaction

Posted: Wed Jan 16, 2019 11:50 pm
by melodyzaki2E
I think K would decrease since in an endothermic reaction is like having heat as a reactant but it will push the reaction forward so i'm not totally sure.