Thermal Diffusion in Binary Liquid Mixtures of Molecules of Simple Symmetry

Abstract

A single‐stage two‐cell apparatus for measuring thermal diffusion in liquid mixtures has been developed. Thermal‐diffusion measurements are presented for a series of binary mixtures of molecules of simple symmetry over a range of temperature from 5°—55°C. The theory presented in a previous paper applies quite satisfactorily. The results indicate that the proposed measure of the cohesive energy $$H_i={\left(T\frac{\mathrm{\partial p}}{\mathrm{\partial T}}\right)}_i{\left(\mathrm{V-T}\frac{\mathrm{\partial V}}{\mathrm{\partial T}}\right)}_i,$$ gives reasonably quantitative results.