4J.1






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Amy Luu 2G
Posts: 105
Joined: Wed Sep 18, 2019 12:19 am

4J.1

Postby Amy Luu 2G » Sat Feb 08, 2020 9:52 pm

Why are so many exothermic reactions spontaneous?
Looking at the equation G = H - TS, in order for a reaction to be spontaneous, G must be negative. What does an exothermic reaction tell us about the enthalpy change or entropy change?

JohnWalkiewicz2J
Posts: 103
Joined: Thu Jul 11, 2019 12:17 am
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Re: 4J.1

Postby JohnWalkiewicz2J » Sat Feb 08, 2020 10:00 pm

If a reaction is exothermic than ΔH will be negative. If ΔH is negative and the exothermic reaction leads to a increase in entropy of the system(+ΔS) than ΔG will be negative and the reaction will occur spontaneously.


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