Which one of the following reactions is likely to have a ΔS° close to zero (in other words, neither positive nor negative)?
a) PCl 3(g) + Cl2(g) ⇌ PCl 3(g)
b) 2KClO 3(s) ⇌ 2KCl(s) + 3O 2(g)
c) CO(g) + H 2O(g) ⇌ CO 2(g) + H 2(g)
d) CO 2(g) ⇌ CO 2(s)
e) C 5H 12(l) + 8O 2(g) ⇌ 5CO 2(g) + 6H 2O(g)
Place the following compounds in order of increasing S°:
PCl5(s) PCl 5(g) PCl 3(g)
a) PCl5(s) < PCl5(g) < PCl3(g)
b) PCl5(s) < PCl3(g) < PCl5(g)
c) PCl5(g) < PCl5(s) < PCl3(g)
d) PCl5(g) < PCl3(g) < PCl5(s)
e) PCl3(g) < PCl5(g) < PCl5(s)
f) PCl3(g) < PCl5(s) < PCl5(g)
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