Which of the following are true statments ?

Question

a) For the reaction CO2(g) → CO2(s)
entropy increases


b) For the reaction NaCl(s) + H2O(l) → NaCl(aq)
entropy increases


c) Molecules Cl2(g) should have have greater
entropy per mole, than molecules of SO2(g)


d) If entropy decreases for a certain process, the entropy of the universe increases

It's NOT bc, c, or bcd.

It's NOT bc, c, bcd or cd.

Answer 1

a) False
b) True
c) True
d) True

Here are some Qualitative "Rules" About Entropy that might help you:

1) The Entropy of any material increases with increasing temperature

2) Entropy increases as one goes from a solid to a liquid, or more dramatically, a liquid to a gas

3) Entropy increases if a solid or liquid is dissolved in a solvent.

4) Entropy increases as the number of particles in a system increases

5) Entropy increases as the mass of a molecule increases

6) Entropy is higher for weakly bonded compounds than for compounds with very strong covalent bonds

7) Entropy increases as the complexity (# of atoms, # of heavier atoms, etc.) of a molecule increases

Answer 2

1. false
2. True
3. Not certain
4. true

Answer 3

It's b and d.