ISOTHERMAL (VAPOR PLUS LIQUID) EQUILIBRIA AND EXCESS VOLUMES OF (3-METHYLPENTANE PLUS HEPTANE), OF (3-METHYLPENTANE PLUS OCTANE), AND OF (TOLUENE PLUS OCTANE) (CORRECTED VERSION OF PC241)

The (vapour + liquid) equilibria of (3-methylpentane + heptane) at T = 308.15 K, 318.15 K, and 328.15 K; of (3-methylpentane + octane) at T = 338.15 K; and of (toluene + octane) at T = 333.15 K, have been obtai ned by using a dynamic still, and excess volumes of these mixtures hav e been measured at T = 298.15 K using an Anton-Paar densitometer. The VLE results were analysed by applying the maximum-likelihood principle and are well correlated by the Wilson, NRTL, and modified UNIQUAC equ ations. They are also compared satisfactorily with a group-contributio n equation of state.