## 7th edition 4I. 5

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

Alyssa Bryan 3F
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### 7th edition 4I. 5

Suppose that 50.0 g of water at 20.0 C is mixed with 65.0 g of water at 50.0 C at constant atmospheric pressure in a thermally insulated vessel. Calculate delta S and delta S total for the process?
Why is there a difference between delta S and delta S total for this process?

Chloe Qiao 4C
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Joined: Fri Sep 28, 2018 12:27 am

### Re: 7th edition 4I. 5

The delta S refers specifically to the hot water and the cold water, and delta S total is the sum of delta S for the cold water and the hot.

Iris Bai 2K
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Joined: Fri Sep 28, 2018 12:18 am

### Re: 7th edition 4I. 5

There are two values for delta S (one for hot and one for cold), and delta S total is just the sum of the two delta S values.

Ashley P 4I
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Joined: Wed Nov 15, 2017 3:04 am

### Re: 7th edition 4I. 5

Does anyone know what equation this is on the 6th edition?