## When is delta S = 0?

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

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Max Hayama 4K
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

### When is delta S = 0?

When is it safe to assume that delta S is equal to 0? Under what conditions and how does this impact S of surroundings and system?

Christina Chang 1C
Posts: 34
Joined: Thu May 10, 2018 3:00 am

### Re: When is delta S = 0?

In a review session, one of the TA's said that if the process is reversible then delta S(universe) would be 0, which means that delta S(surroundings)= -delta S(system). Hope that helped!

Alexa Tabakian 1A
Posts: 38
Joined: Fri Sep 28, 2018 12:20 am

### Re: When is delta S = 0?

delta S equals zero when the reaction is reversible because entropy is a state function. When the process is reversible, it starts and ends in the same place making entropy equal to zero.

Sarah Fatkin 4I
Posts: 71
Joined: Fri Sep 28, 2018 12:27 am

### Re: When is delta S = 0?

Delta S equals zero when there is no heat entering the system, because delta S = q(reversible)/T. Hope this helps!

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