文献类型：期刊文献

中文题名：乙醇在正己烷中的解缔与超额焓

英文题名：Dissociation of Self-association of Ethanol in n-Hexane and Excess Enthalpies of the Mixture

作者：章丽辉[1];黑恩成[1];刘国杰[1]

机构：[1]华东理工大学化学系,上海200237

年份：2002

卷号：18

期号：5

起止页码：441

中文期刊名：物理化学学报

外文期刊名：Acta Physico-Chimica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；PubMed;

语种：中文

中文关键词：乙醇;正己烷;混合物;内压;van;der;Waals模型;解缔;超额焓;热压力分数;液体

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：测定了不同温度和浓度下乙醇与正己烷液体混合物的热压力系数及内压,并用修正的vanderWaals模型关联了这些实验数据,从模型参数B/A2得到了一个乙醇自缔合随组成而遭破坏程度的公式.根据这个公式设想了一个醇与烃的混合模型,建立了混合物的超额焓方程,它能够满意地描述上述混合物的超额焓随组成的变化规律。
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/A2 ,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.