应用离子选择性电极进行溶液热力学研究──ⅠⅩ.RbCl在水及混合溶剂中相对偏摩尔自由能、焓和熵的测定  

USING ION SELECTIVE ELECTRODE TO STUDY THE THERMODYNAMICS OF SOLUTION ⅠⅩ.Determinations of Relative Partial Molar Free Energies, Enthalpies and Entropies of RbCl in Water and Mixtures

作　　者：李林尉[1] 褚德萤[1] 刘瑞麟[1] 

机构地区：[1]北京大学化学与分子工程学院

出　　处：《华中师范大学学报（自然科学版）》1998年第2期186-191,共6页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金

摘　　要：应用Ｃｏｒｎｉｎｇ一价阳离子选择性电极和Ｏｒｉｏｎ氯离子选择性电极组成可逆电池，测定其电动势（Ｅ／ｍＶ），用扩展的Ｄｅｂｙｅ－Ｈüｃｋｅｌ公式，求得７个实验温度下（２８３．１５Ｋ～３１８．１５Ｋ），４个指定组成溶剂和浓度的ＲｂＣｌ的活度系数（γ±）及其温度系数（ｌｎγ±／Ｔ）ｐ，ｍｉ，计算了ＲｂＣｌ在水及混合溶剂（Ｈ２Ｏ－ＤＭＦ）中的相对偏摩尔自由能（ＧＢ、Ｒ）、焓（ＨＢ、Ｒ）和熵（ＳＢ、Ｒ），并对ＲｂＣｌ的相对偏摩尔性质的某些变化规律作了初步讨论．The reversible cells consists of the Corning monovalent cation selective electrode(M + ISE) and choloride selective (CI - ISE) electrode,namely Cl - ISE/RbCl( m ),H 2O(1- X ),DMF (X )/M + ISE.The electromotive forces (- E /mV) of the measured cells have been detemined at seven temperatures from283.15 K to 318.15 K,and activity coefficients( γ ±),temperature coefficients (ln γ ±/ T) p,m i of the activity coefficients and relative partial molar free energies (G B,R ),enthalpies ( H B,R ) and entropies ( S B,R ) of RbCl in water and H 2O DMF mixtures at above experimental temperatures have been calculated.The behaviors of change of relative partial molar properties of RbCl with molar fractions( X ) of DMF in the mixed solvents and concentrations (m i) of the solution were discussed on the bases of theory of electrolytic solution.

关 键 词：活度系数 氯化铷 溶液热力学 离子选择电极 

分 类 号：O614.114[理学—无机化学] O645.164[理学—化学]