Surface tension of electrolyte solutions: Comparing the effects of ionic dispersion forces and solvation

被引：15

作者：

Edwards, SA ^{[1
]}

Williams, DRM ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Appl Math, Canberra, ACT 0200, Australia

来源：

EUROPHYSICS LETTERS | 2006年 / 74卷 / 05期

关键词：

D O I：

10.1209/epl/i2006-10030-0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of salt on the surface tension of water is yet to be understood. We derive approximate analytical expressions for the influence of two different ion-specific effects on the surface tension of an electrolyte: the dispersion interaction between the ions and the air-water interface, and the change in solvation energy of the ions as they approach the interface. These formulae provide a simple means of comparing the relative importance of the two effects. We carry out such a comparison for the case of 1M NaCl, and find that solvation is the dominant effect.

引用

页码：854 / 860

页数：7

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