## 9.71

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

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Dahriel Aron 3A
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### 9.71

In question 9.71 it asks

Which substance would you expect to have the highest molar entropy in the liquid phase, benzene, methanol (CH3OH), or 1-propanol (CH3CH2CH2OH)?

In the solutions manual it says that it is benzene because it has more of a rigid shape. I was wondering what it meant by rigid shape and how this has to do with molar entropy? I thought that since benzene is arranged in a ring it would have a lower entropy since theres not as many ways to rearrange it

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### Re: 9.71

Solution manual for 9.71 states "Since benzene has a more rigid planar ring structure, 1-propanol is expected to have the highest standard molar entropy".

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