Pressure-Temperature-Composition Relations in The Cr-N Terminal Solid Solution

Abstract

The pressure and composition of the solid solution of nitrogen in chromium has been investigated as a function of temperature. The partial molal heat of solution, the activity of nitrogen in solid solution, and the partial molal free energy have been computed. The enthalpy of three reactions is summarized:

$$\begin{array}{*{20}{c}} { + 2C{r_{\left( s \right)}} = C{r_2}{N_{\left( s \right)}},\Delta {H^o} = - 28,500calpermol}\\ {\frac{1}{2}{N_{2\left( g \right)}} + 2C{r_{\left( s \right)}} = C{r_2}{N_{\left( s \right)}},\Delta {H^o} = - 23,500\,cal\,per\,mol}\\ {\frac{1}{2}{N_{2\left( g \right)}} = ,\Delta {H^o} = - 5000\,cal\,per\,mol} \end{array}$$