The free energy of formation of NO is 78 kJ mol–1 at the temperature of an automobile engine (1000 K). What is the equilibrium constant for this reaction at 1000 K ? N (g) O (g) NO(g)
A.8.4 × 10–5✓ Correct
B.7.1 × 10–9
C.4.2 × 10–10
D.1.7 × 10–19
Explanation
According to the equation, ° eq eq eq 5 eq ΔG 2.303RT log K 78000 log K 2.303 8.314 1000 log K 4.07 K =8.4 10 x x x