| 氯化钠从水到乙二醇水混合中的迁移性质 |
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| 引用本文： | 周丽华,杨杰,刘英红,许乃祥,徐海龙.氯化钠从水到乙二醇水混合中的迁移性质[J].淮海工学院学报,2010,19(3):49-51. |
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| 作者姓名： | 周丽华 杨杰 刘英红 许乃祥 徐海龙 |
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| 作者单位： | 淮海工学院,化学工程学院,江苏,连云港,222005 |
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| 基金项目： | 淮海工学院自然科学基金资助项目 |
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| 摘 要： | 在乙二醇和水为混合溶剂中加入NaCl组成三元系,在20~40℃时,改变混合溶剂中乙二醇的质量分数,在w=0%,10%,20%和30%的条件下,测定下列电池电动势AgCl-Ag|NaCl(mA),C2H6O2(w),H2O(1-w)|Na-ISE,(A)确定混合溶剂中AgCl-Ag和Na-ISE电极对在不同温度时的标准电动势,计算了NaCl的迁移性质。结果表明,低温时NaCl在纯水中有较高的吉布斯自由能状态,而在高温时,NaCl在乙二醇和水的混合溶液中处于较高的吉布斯自由能状态。
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| 关 键 词： | 活度系数 迁移性质 电动势 乙二醇 |
Transfer Properties of NaCl from Water to Glycol Water Mixtures |
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| ZHOU Li-hua,YANG Jie,LIU Ying-hong,XU Nai-xiang,XU Hai-long.Transfer Properties of NaCl from Water to Glycol Water Mixtures[J].Journal of Huaihai Institute of Technology:Natural Sciences Edition,2010,19(3):49-51. |
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| Authors: | ZHOU Li-hua YANG Jie LIU Ying-hong XU Nai-xiang XU Hai-long |
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| Affiliation: | (School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China) |
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| Abstract: | The apparent thermodynamic properties of NaCl-C2H6O2H2O system were studied by means emf measurement in the cells of AgCl-Ag ｜ NaCl（mA）,C2H6O2（w）,H2O（1-w） ｜ Na-ISE,（A） at mass fraction of glycol in the mixed solvent,which was w =0%,10%,20% and 30% from 20 to 40℃.The standard potential of AgCl-Ag and Na-ISE in the mixed solution was determined from the values of emf.The standard free energy,entropy and enthalpy of the transfer of NaCl from water to mixed solvent were calculated from cell（A）.The results show that NaCl has a higher Gibbs free energy state in water at low temperatures,but it has a higher Gibbs free energy state in the C2H6O2-H2O mixed solution at high temperatures. |
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| Keywords: | activity coefficients transfer properties emf glycol |
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