Oxygen has a critical volume of 7.34 x 10-5 m3 mol-1. By using the Equation of State P = (R T)/(v (b T)) with b = (vcr/3) where vcr is the critical volume, calculate the difference between the specific heat capacity at constant pressure and the specific heat capacity at constant volume at the state (150 K; 2000 kPa).

a) 0.394 kJ mol-1 K-1 b)252 J mol-1 K-1 c) 0.104 kJ mol-1 K-1 d) 0.098 kJ mol-1 K-1