## reversible system

Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$

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Tiffany Cao 1D
Posts: 94
Joined: Fri Sep 29, 2017 7:03 am
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### reversible system

When a system expands reversibly, does that only mean that change in entropy of the total system and surroundings is 0?

Nishma Chakraborty 1J
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am

### Re: reversible system

Yes, when a system expands reversibly the total entropy of a system and its surroundings is unchanged.

I found this page helpful: http://www.chem.ucla.edu/~vinh/disc7.html

Hope this helps! :)

Yu Chong 2H
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

### Re: reversible system

Yes because whatever entropy the system loses is gained by the surroundings, so the entropy change of the universe is zero.

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