Chapter 17, Problem 17.66QP

In the Mond process for the purification of nickel, carbon monoxide is reacted with heated nickel to produce Ni(CO)₄, which is a gas and can therefore be separated from solid impurities:

$\text{Ni}(s)+4\text{CO}(g)\stackrel{}{\rightleftharpoons }{\text{Ni(CO)}}_{\text{4}}(g)$

Given that the standard free energies of formation of CO(g) and Ni(CO)₄(g) are −137.3 kJ/mol and −587.4 kJ/mol, respectively, calculate the equilibrium constant of the reaction at 80°C. Assume that ΔG_f° is temperature independent.