Coexistence Curve for 3-Methylpentane–Nitroethane near the Critical Point

Abstract

The coexistence curve for the liquid mixture 3‐methylpentane–nitroethane has been obtained using a visual and a float technique. A detailed analysis of the data shows that the composition differences of the coexisting liquid phases are proportional to ${\mathrm{(t}}_c{\mathrm{\hspace{0.17em}—\hspace{0.17em}rpar;}}^{\beta }$ , where $\text{β\hspace{0.17em}=\hspace{0.17em}0.340}$ with a standard deviation of 0.010. As a result of this analysis and an analysis of the earlier work of Rice and Zimm it is shown that the value of $\beta$ for binary liquids is not significantly different from the value for gas–liquid systems.