Chemistry Forum

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

If a) is correct, how can be the solution of b) is correct?
c) is wrong
d) correct
e) correct
f) wrong

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.

I think so.

Axel wrote: ↑Tue Apr 19, 2022 6:08 pm mcdvoice
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.

I really like this post