| 汽液平衡法研究NaI在甲醇-苯中的活度系数 |
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| 引用本文： | 杨美芳,冷春莉,李淑彩,孙仁义.汽液平衡法研究NaI在甲醇-苯中的活度系数[J].河南大学学报(自然科学版),2006,36(4):32-37. |
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| 作者姓名： | 杨美芳 冷春莉 李淑彩 孙仁义 |
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| 作者单位： | 河南大学,化学化工学院,河南,开封,475001 |
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| 摘 要： | 测定了甲醇-苯-NaI体系常压汽液平衡数据,采用双标准检验法对数据进行检验,检验结果全部合格.假定NaI的平均活度系数可表示为盐浓度平方根(m1/2)的幂级数,采用全部合格的汽液平衡数据拟合出幂级数中的各项系数,从而获得在双液比固定条件下盐在非水混合体系的活度系数.计算结果表明正常泡点温度下在具有固定双液比的甲醇-苯混合溶剂中NaI的平均活度系数随盐浓度的增加先减小,经过一个极小值后又增加.此法可推广于其它非水混合溶剂中电解质活度系数的测定.
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| 关 键 词： | 非水体系 汽液平衡 碘化钠 活度系数 |
| 文章编号： | 1003-4978（2006）04-0032-06 |
| 收稿时间： | 2006-01-16 |
| 修稿时间： | 2006年1月16日 |
Study of Activity Coefficients for Sodium Iodide in Methanol-benzene System by Vapor-liquid Equilibrium Measurements |
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| YANG Mei-fang,LENG Chun-li,LI Shu-cai,SUN Ren-yi.Study of Activity Coefficients for Sodium Iodide in Methanol-benzene System by Vapor-liquid Equilibrium Measurements[J].Journal of Henan University(Natural Science),2006,36(4):32-37. |
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| Authors: | YANG Mei-fang LENG Chun-li LI Shu-cai SUN Ren-yi |
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| Institution: | Department of Chemistry, Henan University, Henna Kai feng 475001, China |
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| Abstract: | By measuring the vapor-liquid equilibrium of methanol-benzene-NaI and verifying the data by means of ternary Gibbs-Duhem equation,the data of the vapor-liquid equilibrium of methanol-benzene-NaI were in agreement with both criterious.It is supposed that the mean activity coefficients of NaI may be represented by power of m~(1/2).Then each parameter of power equation was fitted.The results of calculation show that at the equilibrium temperature and pressure the activity coefficients of NaI in methanol-benzene system with fixed composition decrease at first as its concentration increases,then they pass a minimum and increase gradually again.This method is adapted to determination of electrolytical activity coefficients in non-aqueous solvents. |
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| Keywords: | non-aqueous solvents vapor-liquid equilibrium sodium iodide activity coefficients |
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