汽液平衡法研究溴化钠在水-乙醇混合溶剂中的活度系数  

Study of Activity Coefficient for Sodium Bromide in Water-Ethanol System by Vapor-Liquid Equilibrium Measurements

作　　者：孙仁义[1] 李永红[1] 冷春莉[1] 

机构地区：[1]河南大学化学化工学院,河南开封475001

出　　处：《河南大学学报（自然科学版）》2003年第4期54-56,61,共4页Journal of Henan University:Natural Science

基　　金：河南省教委基础研究项目(编号:2000150028)

摘　　要：测定了水-乙醇-NaBr在常压(100.8±0.2kPa)下的汽液平衡数据 通过对汽液平衡数据的关联给出双液比固定条件下盐在混合溶剂中活度系数的计算方法 计算结果表明在具有固定双液比的乙醇-水混合溶剂中NaBr的平均活度系数随其浓度的增加呈现先减小。The isobaric vapor-liquid equilibrium of water-ethanol-NaBr system was determined at normal atmosphere (100.8±0.2kPa). A calculation method for activity coefficients of salt in liquid mixtures with fixed composition was proposed by means of correlating vapor-liquid equilibrium data. The results of calculation show that the mean activity coefficients of NaBr in liquid mixture with constant composition decrease at first as its concentration increases, then they pass a minimum and increase gradually again.

关 键 词：汽液平衡 溴化钠 乙醇 水 活度系数 

分 类 号：O645.16[理学—物理化学]