Question

Classify each of the following reactions as one of these four types: • spontaneous at all temperatures • not spontaneous at any temperature • spontaneous below a certain temperature but not above • spontaneous above a certain temperature but not below See Table 17.1 in Tro, Fridgen and Shaw. (a) 2 NO2 (g) → 2 NO (g) + O2 (g); ∆H = 115.4 kJ; ∆S = 146.5 J/K (b) MgS (s) + Pb (s) → PbS (s) + Mg (s); ∆H = -66 kJ; ∆S = 9 J/K (c) 16 CO2 (g) + 18 H2O (g) → 2 C8H18 (l) + 25 O2 (g); ∆H = 10139 kJ; ∆S = -977 J/K (d) CO (g) + 3 H2 (g) → CH4 (g) + H2O (g); ∆H = -206.1 kJ; ∆S = -214.6 J/K

Answer 1