| 乙醇-环己烷体系中NaI活度系数的测定与计算 |
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| 引用本文： | 王芳,姬学亮,曹红霞.乙醇-环己烷体系中NaI活度系数的测定与计算[J].化学研究与应用,2007,19(10):1143-1147. |
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| 作者姓名： | 王芳 姬学亮 曹红霞 |
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| 作者单位： | 开封大学化学工程学院,河南,开封,475004 |
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| 基金项目： | 国家自然科学基金资助项目(20272019) |
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| 摘 要： | 由于非水溶剂的应用日趋广泛,促使物理化学工作者对于溶剂和溶液性质进行研究,同时开展了有关物理化学数据的测定和积累工作,以利于指导实践1]。目前文献报道含水混合溶剂中的电解质活度系数较多,但非水混合溶剂中电解质活度系数报道较少。电解质浓溶液活度系数的计算方法目前应用较广的是Pitzer半经验算法2]。Pitzer的算法中具体物系的β(0)、β(1)等系数需从实测活度系数数据拟合求得。孙仁义等通过测定汽液平衡盐效应的方法研究了盐在混合溶剂中的活度系数3-4]。最近孙仁义等5]提出了双液比固定条件下含盐体系汽液平衡数据热力学一…
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| 关 键 词： | 乙醇 环己烷 汽液平衡 活度系数 Pitzer方程 碘化钠 |
| 文章编号： | 1004-1656（2007）10-1143-05 |
| 收稿时间： | 2006-12-29 |
| 修稿时间： | 2007-06-06 |
Measurement and calculation of the activity coefficients of NaI in ethanol-hexamethylene system |
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| WANG fang,JI Xue-liang,CAO Hong-xia.Measurement and calculation of the activity coefficients of NaI in ethanol-hexamethylene system[J].Chemical Research and Application,2007,19(10):1143-1147. |
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| Authors: | WANG fang JI Xue-liang CAO Hong-xia |
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| Institution: | Department of Chemistry Engineering, Kaifen University, Kaifeng 475004,China |
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| Abstract: | 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. |
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| Keywords: | ethanol hexamethylene vapor-liquid equilibrium activity coefficients Pitzer equation sodium iodide |
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