Thermal Conductivity and Eucken Correction for Diatomic Gases and Binary Gas Mixtures

Abstract

The thermal conductivity of pure oxygen, nitrogen, and hydrogen gases and of the binary gas mixtures O₂—A, N₂—A, and H₂—A at several concentrations have been measured by using a thick‐wire conductivity cell at 38°C. These data have been used to calculate the Eucken factor for the diatomic gases and the binary gas mixtures. The experimental value of the thermal conductivity and the Eucken factor have been compared with the theoretical values obtained on the Lennard‐Jones (12:6) model. Hirschfelder's recent expression for the thermal conductivity of polyatomic gas mixtures has also been tested at some length. It is found that Hirschfelder's expression is substantially correct in its dependence on the individual conductivities.