At 298 K, the equilibrium constant for is 6.9. The reaction enthalpy change is…

CHEMISTRY · Subjective · AP · Chemistry · Equilibrium · Equilibrium

Problem

At 298 K, the equilibrium constant for

2\,\mathrm{NO_2(g)} \rightleftharpoons \mathrm{N_2O_4(g)}

is 6.9. The reaction enthalpy change is

\Delta H = -57.2\,\text{kJ mol}^{-1}

(assumed temperature-independent). Using

R = 8.314\,\text{J mol}^{-1}\,\text{K}^{-1}

, calculate the equilibrium constant at 320 K.