## 9.13

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

Ethan-Van To Dis2L
Posts: 50
Joined: Fri Sep 29, 2017 7:05 am

### 9.13

For this problem how would you find the moles of nitrogen gas? I tried doing the 22.4L/mole conversion but when I did, my answer was way off. The specific heat I calculated was 29.101 since its a linear molecule at a constant pressure which is (7/2)R.

Naveed Zaman 1C
Posts: 62
Joined: Fri Sep 29, 2017 7:04 am
Been upvoted: 2 times

### Re: 9.13

I believe the solutions manual says that you just assume 1 mole of nitrogen gas (it's not mentioned anywhere in the problem).

OliviaShearin2E
Posts: 37
Joined: Fri Sep 29, 2017 7:05 am

### Re: 9.13

I can confirm that you get the correct answer from using 1 mol of gas. There are also a few other problems in the homework with this assumption.

Chris Lamb 1G
Posts: 58
Joined: Fri Jun 23, 2017 11:39 am

### Re: 9.13

I thought it was odd that you are expected to assume one mole. It seems like something that you can't assume; you need to be given it? But it this a safe assumption for future problems?