Chapter 15.4, Problem 15.8WE

The equilibrium constant, K_P, for the reaction

${\text{N}}_{\text{2}}{\text{O}}_{\text{4}}\left(g\right)\rightleftarrows {\text{2NO}}_{\text{2}}\left(g\right)$

is 0.113 at 298 K, winch corresponds to a standard free-energy change of 5.4 kJ/mol. In a certain experiment, the initial pressures are = 0.453 atm and = 0.122 atm. Calculate ΔG for the reaction at these pressures, and predict the direction in which the reaction will proceed spontaneously to establish equilibrium.