A gas mixture containing equal molar amounts of oxygen and nitrogen gases and a mass flow rate of 2 kg/s enters a compressor with 75% efficiency at 220 K and 1 bar and exits at 393 K and 60 bar. Assuming that the gas mixture behaves as an ideal gas at compressor inlet conditions, find the compressor work requirement (kW) using Lee/Kesler correlations. For gas mixture H = 29.3 kJ/kmol.K.