State of matter affect entropy

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205007651
Posts: 53
Joined: Tue Nov 13, 2018 12:17 am

State of matter affect entropy

Postby 205007651 » Tue Feb 11, 2020 1:55 pm

How does the standard entropy of a reaction depend on the state of a molecule(like whether it's a liquid or gas)? This question was asked much earlier but not really a concise answer was given. Thanks!

Sebastian Lee 1L
Posts: 157
Joined: Fri Aug 09, 2019 12:15 am
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Re: State of matter affect entropy

Postby Sebastian Lee 1L » Tue Feb 11, 2020 3:55 pm

The standard entropy of a reaction will generally increase (+delta S) if you go from solid to liquid/gas or liquid to gas because you are going from more ordered, confined molecules to a lot more space and more possible states for the molecules. There's more space and movement in a gas than a solid so the entropy will increase.

ABombino_2J
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: State of matter affect entropy

Postby ABombino_2J » Tue Feb 11, 2020 4:22 pm

Typically entropy will increase as heat is added and vice-versa because deltaS= delta q/T

Bryan Chen 1H
Posts: 58
Joined: Mon Jun 17, 2019 7:24 am

Re: State of matter affect entropy

Postby Bryan Chen 1H » Tue Feb 11, 2020 7:01 pm

typically, liquids occupy more space or are more disorderly than solids, and same for gas and liquids


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