RbCl由H_2O至混合溶剂(H_2O-DMF)标准迁移熵的测定  

Determination of Standard Transfer Entropies of RbCl from H_2O to Mixtures of H_2O-DMF 

作　　者：李林尉[1] 褚德萤[2] 刘瑞麟[2] 

机构地区：[1]聊城师范学院化学系,聊城252059 [2]北京大学化学与分子工程学院,北京100871

出　　处：《物理化学学报》1999年第3期265-268,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金

摘　　要：The standard electromotive forces of the reversible cells consisted of the Corning monovalent general cation selective electrode (M + ISE) and chloride selective electrode (Cl ISE), namely Cl --ISE｜RbCl( m ),H 2O(1- x ),DMF( x )｜M +-ISE have been measured, and the standard free energies of transfer(Δ S t ) of RbCl from H 2O to mixtures of H 2O DMF have been calculated, the standard transfer entropies(Δ S t ) have been also calculated from temperature coefficients of Δ G t of RbCl at seven temperatures from 283.15 K to 318.15 K. The behavior of change of Δ S t of RbCl with experimental temperature and mole fraction ( x ) of DMF in the mixed solvents and its influence on the structure of the mixed solvents were discussed on the basis of solvation theory ofelectrolyte solution.The standard electromotive forces of the reversible cells consisted of the Corning monovalent general cation selective electrode (M + ISE) and chloride selective electrode (Cl ISE), namely Cl --ISE｜RbCl( m ),H 2O(1- x ),DMF( x )｜M +-ISE have been measured, and the standard free energies of transfer(Δ S t ) of RbCl from H 2O to mixtures of H 2O DMF have been calculated, the standard transfer entropies(Δ S t ) have been also calculated from temperature coefficients of Δ G t of RbCl at seven temperatures from 283.15 K to 318.15 K. The behavior of change of Δ S t of RbCl with experimental temperature and mole fraction ( x ) of DMF in the mixed solvents and its influence on the structure of the mixed solvents were discussed on the basis of solvation theory ofelectrolyte solution.

关 键 词：标准迁移熵 溶剂化 迁移 氯化物 混合溶剂 溶液 

分 类 号：O614.114[理学—无机化学] O645.171[理学—化学]