乙醇-环己烷体系中NaI活度系数的测定与计算  

Measurement and calculation of the activity coefficients of NaI in ethanol-hexamethylene system

作　　者：王芳[1] 姬学亮[1] 曹红霞[1] 

机构地区：[1]开封大学化学工程学院,河南开封475004

出　　处：《化学研究与应用》2007年第10期1143-1147,共5页Chemical Research and Application

基　　金：国家自然科学基金资助项目(20272019)

摘　　要：By measuring the vapor-liquid equilibrium of ethanol-hexamethylene-NaI and testing the data using the ternary Gibbs-Duhem equation,the experimental results of the vapor-liquid equilibrium with thermodynamics consistency are obtained.Applying the Pitzer equation of the activity coefficients of 1-1 type electrolyte to non-aqueous mixed solvents,each parameter of the equation was obtained by the method of least squares.The calculation results show that the activity coefficients of NaI in ethanol-hexamethylene system with constant composition decrease as its concentration increases.This method is adapted to determination of electrolytical activity coefficients in non-aqueous solvents.By measuring the vapor - liquid equilibrium of ethanol - hexamethyiene - NaI and testing the data using the ternary Gibbs -Duhem equation, the experimental results of the vapor- liquid equilibrium with thermodynamics consistency are obtained. Applying the Pitzer equation of the activity coefficients of 1 - 1 type electrolyte to non - aqueous mixed solvents, each parameter of the equation was obtained by the method of least squares. The calculation results show that the activity coefficients of NaI in ethanol - hexamethylene system with constant composition decrease as its concentration increases. This method is adapted to determination of electrolytical activity coefficients in non - aqueous solvents.

关 键 词：乙醇 环己烷 汽液平衡 活度系数 PITZER方程 碘化钠 

分 类 号：O645.16[理学—物理化学]