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WAEC - Chemistry (1993 - No. 11)
In which of the following changes is ∆S negative ?
H
2
O
(l)
→ H
2
O
(s)
C
(s)
+ 1/2O
2,/sub>
(g)
→ CO
(g)
PCI
5
(g)
→ PCl
3
(g)
+ Cl
2
(g)
NaCl
(s)
+ aq →Na
+
(aq)
+ Cl
-
(aq)
NH
3
(g)
+ HCl
(g)
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