The Effect of Pressure on Thermal Diffusion in n-Paraffin Hydrocarbon-CS2 Mixtures

Thermal diffusion measurements have been made to 10 000 atmospheres at 40°C and 78°C pressure for the systems. $$\begin{array}{c}\mathrm{n-}\mathrm{hexane}\text{\hspace{0.17em}(20\hspace{0.17em}}\mathrm{percent}\mathrm{)-}{\mathrm{CS}}_2\text{\hspace{0.17em}(80\hspace{0.17em}}\mathrm{percent}\mathrm{),}\\ \mathrm{n-}\mathrm{heptane}\text{\hspace{0.17em}(20\hspace{0.17em}}\mathrm{percent}\mathrm{)-}{\mathrm{CS}}_2\text{\hspace{0.17em}(80\hspace{0.17em}}\mathrm{percent}\mathrm{),}\\ \mathrm{n-}\mathrm{octane}\text{\hspace{0.17em}(20\hspace{0.17em}}\mathrm{percent}\mathrm{)-}{\mathrm{CS}}_2\text{\hspace{0.17em}(80\hspace{0.17em}}\mathrm{percent}\mathrm{),}\end{array}$$ at 40°C and 78°C. The data are interpreted in terms of a modified regular solution theory presented previously. The results are consistent with the theory and the regularities indicate that a general quantitative theory of thermal diffusion is possible.