For each of the following processes, tell whether the entropy of the universe increases, decreases, or remains constant.
a. Solid NaCl is dissolved in water at room temperature.
b. A saturated solution of NaCl is cooled, causing some solid NaCl to precipitate.
C. Water freezes.
d. Carbon tetrachloride, CCl4, evaporates.
e. The reaction PC13(g) + Cl2(g) → PC15(g) occurs.
f. The reaction 2CH3OH(1) + 302(g) → 2CO2(g) + 4H2O(g) occurs.
I'm not sure about my answers. Can someone correct me if I'm wrong? Thank you.
My answers:
a. inc
b. inc
c. constant
d. inc
e.dec
f. dec
Entropy of the universe
Moderators: Xen, expert, ChenBeier
- ChenBeier
- Distinguished Member
- Posts: 1569
- Joined: Wed Sep 27, 2017 7:25 am
- Location: Berlin, Germany
Re: Entropy of the universe
If a) is correct, how can be the solution of b) is correct?
c) is wrong
d) correct
e) correct
f) wrong
c) is wrong
d) correct
e) correct
f) wrong
Re: Entropy of the universe
a. inc
b. dec
c. dec
d. inc
e.dec
f. inc
Are these now correct? It's entropy of the universe by the way.
b. dec
c. dec
d. inc
e.dec
f. inc
Are these now correct? It's entropy of the universe by the way.
- ChenBeier
- Distinguished Member
- Posts: 1569
- Joined: Wed Sep 27, 2017 7:25 am
- Location: Berlin, Germany
Re: Entropy of the universe
I think so.