Classify each of the following reactions as one of the four possible types:
1. spontaneous at all temperatures;
2. nonspontaneous at all temperatures;
3. spontaneous at low T; nonspontaneous at high T;
4. spontaneous at high T; nonspontaneous at low T.
(a) N2 (g) + 3F2(g) → 2NF3 (g);
ΔH° = -249 kJ; ΔS° = -278 J/K
(b) N2(g) + 3Cl2(g) → 2NCl3 (g);
ΔH° = 460 kJ; ΔS° = -275 J/K
(c) N2F4(g) → 2NF2(g);
ΔH° = 85 kJ; ΔS° = 198 J/K
Drag the appropriate reactions to their respective bins.