The change in entropy, Δ∘rxn , is related to the the change in the number of moles of gas molecules, Δgas . Determine the change in the moles of gas for each of the reactions and decide if the entropy increases, decreases, or has little or no change. A. C(s)+H2O(g) ⟶ CO(g)+H2(g)
Δgas =
The entropy, Δ∘rxn,
a) decreases
b) has little or no change
c) increases

B. H2O2(l) ⟶ H2(g)+O2(g)
Δgas =
The entropy, Δ∘rxn,
a) decreases
b) has little or no change
c) increases

C. S(s)+O2(g) ⟶ SO2(g)
Δgas =
The entropy, Δ∘rxn,
a) decreases
b) has little or no change
c) increases

D. N2O2(g) ⟶ 2NO(g)+O2(g)
Δgas =
The entropy, Δ∘rxn,
a) decreases
b) has little or no change
c) increases