Thermodynamic Quantities of Surface Formation of Aqueous Electrolyte Solutions III. Aqueous Solutions of Alkali Metal Chloride

Author： Matubayasi N.   Yamamoto K.   Yamaguchi S-I.   Matsuo H.   Ikeda N.  

Publisher： Academic Press

ISSN： 0021-9797

Source： Journal of Colloid and Interface Science, Vol.214, Iss.1, 1999-06, pp. : 101-105

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Abstract

The surface tensions of aqueous salt solutions of LiCl, KCl, and CsCl were measured as a function of concentration and temperature. By analyzing the results, the thermodynamic quantities of surface formation such as entropy (Δs), Helmholtz free energy (Δf), and energy of surface formation (Δu) were evaluated. Addition of salts into aqueous solution leads to an increase in Δf but decreases in Δs and Δu. The variations of Δs, Δf, and Δu with the change of salt concentration are almost the same for all alkali metal chlorides in spite of their large difference in hydration force.

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