The Free Energy of Formation of Nitric Oxide, NO, at 1000

Multiple Choice

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 K_p for the reaction N₂(g) + O₂(g) $\leftrightharpoons$ 2NO(g) at this temperature.

A) K_p = 6.9 * 10^-9
B) K_p = 7.1 *10^-9
C) K_p = 7.3 * 10^-9
D) K_p = 7.5 * 10^-9
E) None of the above