Temperature and Equilibrium

Tamera Scott 1G
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am

Temperature and Equilibrium

I understand that raising the temperature of an equilibrium will tend to shift its composition in the endothermic direction of the reaction, but how do you know which side of the reaction is endothermic and exothermic?

Posts: 77
Joined: Fri Sep 28, 2018 12:28 am
Been upvoted: 1 time

Re: Temperature and Equilibrium

Usually you can tell by looking at whether or not the reaction is overall endothermic or exothermic. Usually with problems like that they should give you a delta H or just tell you.

bonnie_schmitz_1F
Posts: 81
Joined: Fri Sep 28, 2018 12:24 am
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Re: Temperature and Equilibrium

In general how can you tell if determine if a reaction is exothermic or endothermic?

whitney_2C
Posts: 74
Joined: Fri Sep 28, 2018 12:28 am

Re: Temperature and Equilibrium

bonnie_schmitz_1F wrote:In general how can you tell if determine if a reaction is exothermic or endothermic?

You would have to calculate the enthalpy or $\Delta H$ of the reaction to be able to know if a reaction is endothermic or exothermic. If the enthalpy is negative then it is exothermic and if it is positive then it is endothermic. We haven't gotten into thermodynamics yet but there are a bunch of ways to calculate the enthalpy of a reaction that we'll find out about later.
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