Liquid-vapor phase equilibria and the thermodynamic properties of binary solutions of n-alkylbenzenes

Liquid-vapor phase equilibria were studied for binary systems formed by n-alkylbenzenes. The contributions of intermolecular interactions to the thermodynamic functions of n-alkylbenzenes and their binary solutions were calculated. The contributions of intermolecular interactions to the Helmholtz energy of binary solutions of constant molar concentrations formed by n-butylbenzene and n-alkylbenzenes were found to depend linearly on the molecular weight of n-alkylbenzene in the homologous series. The corresponding equations were suggested.