?Classify each of the following reactions as one of the four possible types summarized

Chapter 19, Problem 19.63

(choose chapter or problem)

Classify each of the following reactions as one of the four possible types summarized in Table 19.3:

(i) spontanous at all temperatures;

(ii) not spontaneous at any temperature;

(iii) spontaneous at low T but not spontaneous at high T;

(iv) spontaneous at high T but not spontaneous at low T.

(a) \(\mathrm{N}_{2}(g)+3 \mathrm{~F}_{2}(g) \longrightarrow 2 \mathrm{NF}_{3}(g)\)

\(\Delta H^{\circ}=-249 \mathrm{~kJ} ; \Delta S^{\circ}=-278 \mathrm{~J} / \mathrm{K}\)

(b) \(\mathrm{N}_{2}(g)+3 \mathrm{Cl}_{2}(g) \longrightarrow 2 \mathrm{NCl}_{3}(g)\)

\(\Delta H^{\circ}=460 \mathrm{~kJ} ; \Delta S^{\circ}=-275 \mathrm{~J} / \mathrm{K}\)

(c) \(\mathrm{N}_{2} \mathrm{~F}_{4}(g) \longrightarrow 2 \mathrm{NF}_{2}(g)\)

\(\Delta H^{\circ}=85 \mathrm{~kJ} ; \Delta S^{\circ}=198 \mathrm{~J} / \mathrm{K}\)

Text Transcription:

N2(g) + 3 F2(g) longrightarrow 2 NF3(g)

Delta H^circ = -249 kJ; Delta S^circ = -278 J/K

N2(g) + 3 Cl2(g) longrightarrow 2 NCl3(g)

Delta H^circ = 460 kJ; Delta S^circ = -275 J/K

N2F4(g) longrightarrow 2 NF2(g)

Delta H^circ = 85 kJ; Delta S^circ = 198 J/K