Thermochemical studies on partially miscible binary liquid mixtures of aniline with n-hexane, n-heptane and water

Abstract

The excess enthalpies of mixing (H^E) of partially miscible liquid pairs of aniline with n-hexane, <em>n-</em>heptane and water have been determined at 300.05K (T₁) and 321.35K (T₂) in both miscible and partially miscible regions of composition. Positive deviations from ideality are observed. The excess enthalpies of mixing, H^E(mix), in the two phase regions vary linearly with composition but the partial molar enthalpies, <img src='http://www.niscair.res.in/jinfo/equation101.gif' border=0>(mix), of the components are ind9Jendent of composition in this region. The plots of <img src='http://www.niscair.res.in/jinfo/equation101.gif' border=0> versus composition show sudden discontinuities at compositions corresponding to maximum mutual solubilities of the components.