Low Temperature Transport Properties of Gases. II. Neon, Argon, Krypton, and Xenon

Abstract

Values are computed for the viscosity, thermal conductivity, and coefficient of self-diffusion, as functions of temperature, for the following gases: neon (60°−200°K), argon (110°−290°K), krypton (150°−370°K), and xenon (210°−550°K). The method of calculation is the same as that previously developed for gaseous helium and involves the use of classical scattering theory within angular regions where diffraction effects are absent, to obtain appropriate classical transport cross sections for insertion into the exact formulas of Chapman and Enskog. The average absolute deviations between calculated and experimental values are 5.5 percent for viscosity and 5.9 percent for thermal conductivity. In the case of self-diffusion, only two experimental values are available for comparison with calculated values, one each for krypton and xenon. The absolute deviations are 9.7 and 10.3 percent, respectively. A procedure is suggested for obtaining approximate values of the mutual diffusion coefficient of a binary gas mixture from the self-diffusion coefficients of the constituents.