8.6 Compute the heat capacity of nitrogen at 150 K and 150 bar. At these conditions, nitrogen is described by the virial equation of state truncated at the second virial coefficient. Assume that the interaction poten- tial between nitrogen molecules can be described by the spherically symmetric square-well potential. The following data are available: E/ k = 95.2K; 0 = 3.277A; RSw = 1.58