Thermodynamic properties of the system $N_2O_4\rightleftharpoons2NO_2 and 2NO_2\rightleftharpoons2NO + O_2$

Thermodynamic properties of the chemically reactive system $N_2O_4\rightleftharpoons2NO_2 and 2NO_2\rightleftharpoons2NO + O_2$ have been evaluated over a pressure range of 0.005 to 200.0 atm. and a temperature range of 200° to 900°K. by making use of Lennard-Jones potential. In these calculations, the dissociation of nitrogen tetroxide to nitrogen dioxide, nitric oxide and oxygen, and the effect of pressure on the equilibrium constants for the system of reactions $N_2O_4\rightleftharpoons2NO_2 and 2NO_2\rightleftharpoons2NO + O_2$ have been taken into account.