Thermophysical Properties of a Krypton Gas

Abstract

In this work, we use the Chapman-Enskog model to evaluate the transport parameters of a dilute gas formed of monatomic krypton Kr(4p). We calculate the coefficients of self-diffusion, viscosity, and thermal conductivity when the krypton atoms are in their fundamental electronic configurations. The calculations are carried out quantum mechanically, making use of the potential energy curve, relative to the ^1Σ^+ molecular state. The data points upon which the construction is made are smoothly connected to the long-and short-range forms. They are supposed to behave analytically like 1/R^n and α exp(-βR), respectively. The spectroscopic data, r_e and D_e are in accordance with what is available in the literature. The second virial coefficients are also calculated at lower temperatures when the quantum effects are very important and for moderate and high temperatures. Our computation yields a value of the Boyle temperature T_B~555K. Generally, the results of the transport parameters with temperature show an excellent agreement with the available published data.