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
收藏
页码：854 / 860
页数：7
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