文献类型：期刊文献

英文题名：Dissociation of self-association of ethanol in n-hexane and excess enthalpies of the mixture

作者：Zhang, LH; Hei, EC; Liu, GJ

机构：[1]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2002

卷号：18

期号：5

起止页码：441

外文期刊名：ACTA PHYSICO-CHIMICA SINICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000175739600012)】；

语种：英文

外文关键词：mixtures of ethanol and n-hexane; internal pressure; modified van der Waals' model; dissociation of self-association; excess enthalpy

摘要：The thermal pressure coefficients and internal pressures of ethanol + n-hexane liquid mixtures have been measured at different temperatures and compositions. These experimental data are corrected with modified van der Waals model proposed in our previous work. From the parameter of this model B/A(2), a formula describing the relationship between the dissociation degree of self-association and the composition of ethanol in the mixture is obtained. Based on this formula, a model is designed for the mixing of alcohols and hydrocarbons and the equation which can be satisfactorily used to describe the variation of excess enthalpies with the composition are established. It can clearly display the contributions of the physical and chemical action to the excess enthalpies.