The free energy of formation of nitric oxide, NO, at 1000 K (roughly the temperature in an automobile engine during ignition) is about 78 kJ/mol. Calculate the equilibrium constant Kp for the reaction N2(g) + O2(g) > 2NO(g) at this temperature.

A. Kp = 6.9 × 10–9
B. Kp = 7.1 × 10–9
C. Kp = 7.3 × 10–9
D. Kp = 7.5 × 10–9
E. None of the above