Starting from non-isothermal excess enthalpy data (two or more than two sets) and isothermal vapor pressure data (one set)

and based on the principle of corresponding states of solutions

a complete computation procedure of vapor-liquid equilibrium data is proposed. (1) Calculation of excess enthalpy HE

based on the principle of corresponding states of solutions; (2) Calculation of Gibbs free energy GE or its Q function; (3) Calculation of bubbling point; (4) Calculation of vapor-liquid equilibrium data. The computation results for benzene-cyclohexane

benzene-n-hexane

benzene-n-heptane

benzene-n-octane

carbon tetrachloride-benzene

carbon tetrachloride-cyclohexane and carbon tetrachloride-n-heptane

compared with the corresponding vapor-liquid equilibrium experimental data are quite satisfactory. The proposed computation procedure is appropriate to non-polar and slightly polar binary systems under relatively low pressures.