| 用汽液平衡法研究NaI在乙醇-环己烷中的活度系数 |
| |
| 引用本文： | 王芳,王迪.用汽液平衡法研究NaI在乙醇-环己烷中的活度系数[J].开封大学学报,2007,21(3):80-83. |
| |
| 作者姓名： | 王芳 王迪 |
| |
| 作者单位： | 开封大学,化学工程学院,河南,开封,475004 |
| |
| 摘 要： | 测定了乙醇-环己烷-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参数,从而获得在双液比固定条件下盐在非水混合体系中的活度系数.计算结果表明,正常泡点温度下,在具有固定双液比的乙醇-环己烷混合溶剂中,NaI的平均活度系数随盐浓度的增加而减小.此法可推广于其他非水混合溶剂中电解质活度系数的测定.
|
| 关 键 词： | 乙醇 环己烷 汽液平衡 碘化钠 活度系数 |
| 文章编号： | 1008-343X(2007)03-0080-04 |
| 修稿时间： | 2006年12月14 |
Study of Activity Coefficients for Sodium Iodide in Ethanol-hexamethylene System by Vapor-liquid Equilibrium Measurements |
| |
| WANG Fang,WANG Di.Study of Activity Coefficients for Sodium Iodide in Ethanol-hexamethylene System by Vapor-liquid Equilibrium Measurements[J].Journal of Kaifeng University,2007,21(3):80-83. |
| |
| Authors: | WANG Fang WANG Di |
| |
| Abstract: | By measuring the vapor-liquid equilibrium of ethanol-hexamethylene-NaI and verifying the data by means of ternary Gibbs-Duhem equation,the data of the vapor-liquid equilibrium of ethanol-hexamethylene-NaI were in agreement with both criterions.It is supposed that the mean activity coefficients of NaI may be represented by power of m1/2.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 ethanol-hexamethylene system with fixed composition decrease as its concentration increases. This method is adapted to determination of electrolytical activity coefficients in non-aqueous solvents. |
| |
| Keywords: | ethanol hexamethylene vapor-liquid equilibrium sodium iodide activity coefficients |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
