Vapor compositions in binary orqanic systems from p-t-x data coupled with liquid excess properties

A new reduction method is proposed for obtaining liquid activity coefficients and vapor compositions from PTx data in organic systems. One can also include enthalpies of mixing, PTxy data and activity coefficients at infinite dilution in the treatment, thus providing a complete description of the excess Gibbs energy of the liquid phase over a wide range of conditions. The results for the following five binary systems are presented: ethanol + chloroform; n-propylbenzene + methylcyclohexane; 1,4-dichlorobenzene + 1,4-dibromobenzene; methanol + N,N-diethylformamide; ethanol + acetone. In principle, the reduction method can be extended to volatile inorganic and metallic systems where precise total pressure data are available.