Thermophysical Properties of Nitrogen from a New Potential Energy Surface Using the Mason–Monchick Approximation

A recent N2–N2 potential has been used to calculate the second virial, viscosity, and diffusion coefficients. Calculations have been done up to the first quantum correction for virial coefficients and the second-order kinetic theory approximation for transport coefficients. The Mason–Monchick approximation (MMA) has been used for the calculation of collision iIntegrals and, via a numerical analysis, a common iIntersection point has been found for reduced cross sections and collision iIntegrals of different orientations. This regularity has been iInterpreted with the aim of the orientation dependence of the potential energy and different types of collisions between molecules. The overall agreement of the calculated second virial coefficient with experiment is reasonable but suggests that a slight re-scaling of the potential would be beneficial. In the case of transport properties, calculated and experimental results show an average deviation of about 1.6% and 0.7% for viscosity and relative diffusion coefficients, respectively.