Abstract
Thermal diffusion measurements have been made for binary mixtures of CS2 and the five isomeric hexanes at atmospheric pressure and under pressure to 10 000 atmospheres. The data, measured in two different types of apparatus, are consistent. The results indicate that the further the deviation from spherical symmetry, the larger the value of the steric correction factor ψ. Thus, for mixtures of molecules of the same size and cohesive energy, the more spherically symmetrical will concentrate at the cold wall.
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