ZnCl_2在混合溶剂(乙醇-水)中的热力学性质

Studying the thermodynamics of ZnCl_2 in mixed solvent (ethanol and water)

应用锌电极和Ag-AgCl电极组成可逆电池,通过测定电池的电动势,应用Nernst方程和Debye-H櫣ckel极限公式,求得不同温度下ZnCl2在混合溶剂(乙醇-水)中的平均离子活度系数,计算ZnCl2在混合溶剂中的相对偏摩尔自由能,并据电解质溶液的溶剂化理论对ZnCl2的平均离子活度系数及相对偏摩尔自由能的变化规律进行了初步的讨论。

The reversible cell used in this paper consists of the Zinc electrode and the Ag - AgCl electrode. By measuring the electrode potential and using the Nernst formula and the limited formula of Debye - Huekel, the measured the activity coefficients, and relative partial molar free energies of Zinc chloride in Ethanol and Water mixed solvent at above experimental temperatures have been calculated. The behaviors of change of the activity coefficients and the relative partial molar properties of Zinc chloride in Ethanol and Water mixed solvent were discussed on the bases of theory of electrolytic solution.