Determination of Intermolecular Forces from Transport Phenomena in Gases. II

Investigation of Viscosity and Isotopic Thermal Diffusion according to Lennard-Jones Model

抄録

Assuming the intermolecular potential of Lennard-Junes type
U(r)=λ/γ¹²-μ/γ⁶,
coefficient of viscosity η of simple gases and the thermal diffusion ratio of gaseous isotope mixtures have been calculated as functions of temperature. Using the observed values of η for inert gases and CH₄, values of parameters λ and μ are determined. These values agree reasonably well with those derived from the second virial coefficient and from the crystal data. Finally, calculated values of isotopic thermal diffusion ratio are compared with observed values due to Nier. In this case the disagreement is rather large