Which of the processes represented by the following equations has the greatest positive entropy change?

A. C6H3 (l) → C6H6 (g)
B. H2O (s) → H2O (l)
C. CuO(s) + H2 (g) → Cu(s) + H2 (g)
D. Na2CO3 (s) + nH2O (l) →Na2CO3.nH2O (s)
E. S (s) → S (l)

Correct Answer:

Option A – C6H3 (l) → C6H6 (g)