文献类型：期刊文献

中文题名：计算液体及其混合物的C_p-C_v的方法

英文题名：CALCULATION OF c_p-c_v FOR LIQUID AND LIQUID MIXTURES

作者：刘国杰[1];史济斌[1];鲍卫群[1]

机构：[1]华东化工学院化学系,上海200237

年份：1992

卷号：43

期号：4

起止页码：409

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;Scopus;北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：液体;混合物;内压;恒压热容

外文关键词：liquid, liquid mixture, internal pressure, heat capacity at constant pressure, heat capacity at constant volume

摘要：建立了一个能够计算各种温度下液体恒压热容与恒容热容之差的关系式C_p-C_v=RTV^2a/(V^2-AV+B)A和B是两个相关的特性常数,它们的值可由基团贡献法和分子的拓外指数确定.计算结果与实验值相一致.倘若应用A和B的简单混合规则,上述关系式亦适用于液体混合物.
A relation which can be used to calculate the difference between the heat capacity cp and cv for liquids at various temperatures has been established where R, T, V and α are gas constant, thermodynamic temperature, molar volume and thermal expansion coefficient respectively. A and B are two characteristic constants which can be obtained by the methods of group contribution and molecular topologic indexes. The calculated results agreed with experimental values satisfactorilly. The relation is also applicable to liquid mixtures, if simple mixing rule of A and B applies.