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| RbCl由H2O至混合溶剂(H2O-DMF)标准迁移熵的测定 | |
| 引用本文： | 李林尉,褚德萤,刘瑞麟.RbCl由H2O至混合溶剂(H2O-DMF)标准迁移熵的测定[J].物理化学学报,1999,15(3):265-268. |
| 作者姓名： | 李林尉 褚德萤 刘瑞麟 |
| 作者单位： | College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,Department of Chemistry,Liaocheng Teachers College,Liaocheng City 252059 |
| 摘 要： | 电解质迁移热力学性质的测定,对于离子溶剂化的研究具有重要意义.迁移自由能主要反映离子与溶剂分子间的相互作用,迁移熵则主要反映不同溶剂分子间的相互作用,迁移熵随温度及溶剂组成的改变可为溶剂的原有结构推测及溶液秩序改变提供信息.我们曾运用离子选择性电极测定了部分碱金属卤化物在水及含水混合溶剂中的热力学性质1-3].本文用离子选择性电极方法,通过测定不同温度下电池的标准电动势,根据溶液热力学原理,求得ＲｂＣｌ由Ｈ2Ｏ至混合溶剂(Ｈ2ＯＤＭＦ)的标准迁移自由能ΔＧｔ及其温度系数,计算ＲｂＣｌ的标准迁移熵ΔＳｔ.结果尚未见… |
| 关 键 词： | RbCl 标准迁移熵 离子溶剂化 溶剂结构 |
| 收稿时间： | 1998-01-19 |
| 修稿时间： | 1998-06-04 |
Determination of Standard Transfer Entropies of RbCl from H2O to Mixtures of H2O-DMF |
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| Li Linwei,Chu Deying,Liu Ruilin.Determination of Standard Transfer Entropies of RbCl from H2O to Mixtures of H2O-DMF[J].Acta Physico-Chimica Sinica,1999,15(3):265-268. | |
| Authors: | Li Linwei Chu Deying Liu Ruilin |
| Institution: | College of Chemistry and Molecular Engineering,Peking University,Beijing 100871|Department of Chemistry,Liaocheng Teachers College,Liaocheng City 252059 |
| Abstract: | 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(ΔStΘ) of RbCl from H2O to mixtures of H2O DMF have been calculated, the standard transfer entropies(ΔStΘ) have been also calculated from temperature coefficients ofΔStΘof RbCl at seven temperatures from 283.15 K to 318.15 K. The behavior of change ofΔStΘof 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. |
| Keywords: | RbCl Standard transfer entropies Ionic solvation Structure of solvent |
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