Use the free energies of formation given below to calculate the equilibrium constant (K) for the following reaction at 298 K.
2 HNO 3(aq) + NO(g) ? 3 NO 2(g) + H 2O(l) K = ?
?G° f (kJ/mol) -110.9 87.6 51.3 -237.1
a) 1.15 × 10-9
b) 5.11 × 10-4
c) 0.980
d) 1.02
e) 8.71 × 108