水-乙二醇混合溶液中多组分电解质热力学  

Thermodynamics of mixed electrolytes in mixed solvents of glycol and water

作　　者：周丽华[1] 钱保华[1] 许乃祥 徐海龙[1] 

机构地区：[1]淮海工学院化学工程学院,江苏连云港222005

出　　处：《化学研究与应用》2010年第11期1396-1400,共5页Chemical Research and Application

基　　金：淮海工学院自然科学校内课题基金(Z2008025)资助

摘　　要：电解质溶液热力学是物理化学研究的重要组成部分,在无机材料、化学工程、生物化工和湿法冶金以及海洋科学、地质科学和生命科学中具有重要的理论和实际意义。The thermodynamic properties of （NaCl-MgSO4-C2 H6 O2-H2 O） system with compositions of 0%,10%,20% and 30% glycol were studied by means e.m.f.measurements in the cells （A） and （B） from 293.15K to 313.15K.AgCl-Ag ｜ NaCl（mA）,C2H6O2（w）,H2O（1-w） ｜ Na-ISE （A） AgCl-Ag ｜ NaCl（mA）,MgSO4（mB）,C2H6O2（w）,H2O（1-w） ｜ Na-ISE （B） The standard transfer Gibbs free energy,transfer entropy and transfer enthalpy of NaCl from water to mixed solvent were calculated from cell （A）.The activity coefficients of NaCl γA in the mixed solvent system were determined from cell （B）.The results show that the activity coefficient of NaCl in NaCl-MgSO4 solutions still obeys Harned＇s rule at constant ionic strength and lgγA is a linear function of the reciprocal of the absolute temperature at constant composition of the mixture.Relative molar enthalpies of NaCl LA are linear function of the ionic strength fraction of NaCl at constant total ionic strength and temperature.

关 键 词：热力学 活度系数 离子强度 HARNED规则 电动势 

分 类 号：O646.23[理学—物理化学]