111. The dependence of the equilibrium constant N2O4(g) ⇌ 2NO2 (g) on temperature is expressed by the equation lgK = a/T blgT cT d with coefficients
a = -2692 K, b = 1.750, c = -4.83×10-3 K-1, d = 1.943.
Calculate the equilibrium constant and enthalpy of this reaction at 400 K.

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