## 9.45

$\Delta S = \frac{q_{rev}}{T}$

nelms6678
Posts: 53
Joined: Fri Sep 29, 2017 7:07 am

### 9.45

Find the entropy of the surrounding and the system for:
Freezing of 1.00 lol C2H5OH

Would you use the equation delta H over T, just like if it were melting?

Yashaswi Dis 1K
Posts: 56
Joined: Fri Sep 29, 2017 7:04 am

### Re: 9.45

Yes, but you use -delta Hfus for delta H because it's freezing, not melting and keep the temperature the same. Hope that helps!

Eli Aminpour 2K
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

### Re: 9.45

yes, you can use that equation as long as temperature is constant.

LMendoza 2I
Posts: 41
Joined: Sat Jul 22, 2017 3:00 am

### Re: 9.45

Do you use -deltaHfus for the system since it's releasing heat because it is freezing?