Thermodynamic Study of InSb with a Mass Spectrometer

Abstract

The gaseous molecules in thermodynamic equilibrium with solutions of indium and antimony have been determined and their partial pressures measured. From these measurements, partial molar free energies, and heats and entropies of solution have been calculated. In addition, for the gaseous molecules the following dissociation energies have been obtained: $$\begin{array}{c}{\mathrm{\Delta H}}_0^{\circ }\mathrm{\hspace{0.17em}(}\mathrm{Sb}–\mathrm{Sb}\text{)=70.6±1.5\hspace{0.17em}}\mathrm{kcal}/\mathrm{mole},\\ {\mathrm{\Delta H}}_0^{\circ }\mathrm{\hspace{0.17em}(}\mathrm{In}–\mathrm{In}\text{)=22.4±2.5\hspace{0.17em}}\mathrm{kcal}/\mathrm{mole},\\ {\mathrm{\Delta H}}_0^{\circ }\mathrm{\hspace{0.17em}(}\mathrm{In}–\mathrm{Sb}\text{)=35.4±2.5\hspace{0.17em}}\mathrm{kcal}/\mathrm{mole},\\ {\mathrm{\Delta H}}_0^{\circ }\mathrm{\hspace{0.17em}(}\mathrm{InSb}–\mathrm{Sb}\text{)=66.7±2.5\hspace{0.17em}}\mathrm{kcal}/\mathrm{mole}.\end{array}$$