Which relationship or statement best describes $\Delta$ S° for the following reaction?
HgS(s) + O₂(g) $\to$ Hg(l) + SO₂(g)

Question

Which relationship or statement best describes $\Delta$S° for the following reaction? HgS(s) + O₂(g) $\to$ Hg(l) + SO₂(g)

Quizplus · Accepted Answer

The given reaction is a conversion of solid HgS and gas SO2 into liquid Hg and gas SO2. The entropy of the system should decrease because solid HgS has lower entropy than a liquid, and gas SO2 has higher entropy than solid HgS. Therefore, the reaction is not spontaneous, and the value of ΔS° should be negative. According to the relationship ΔG° = ΔH° - TΔS°, if ΔS° is negative, and ΔH° is negative for the given reaction, then ΔG° should be positive (ΔG° = ΔH° - TΔS° > 0). Therefore, the best choice is C, which states that ΔS° > 0.

Which Relationship or Statement Best Describes Δ\DeltaΔ S° for the Following Reaction? HgS(s) + O2(g)

Which Relationship or Statement Best Describes $\Delta$ S° for the Following Reaction?
HgS(s) + O₂(g)