Where is liquid-vapor interface located in solutions?

Details Where is liquid-vapor interface located in solutions? Where is liquid-vapor interface located in solutions?

2010-10-05

arxiv.org/abs/1010.0794v3

Euromech 367 (1997) 53-60

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

Two-component liquid-vapor systems are modeled as two bulk phases divided by a two-dimensional surface phase and the mass and momentum balances are theoretically studied. Comparing the derived equations with some typical models of surface rheology, useful information about the interface location is obtained. It is demonstrated that the surface phase, set on the surface of tension, coincides with the equimolecular interface for insoluble surfactants, whereas it is placed on the surface of zero total mass density excess for soluble ones. The applicability of the model to surface electrostatics is also discussed by introduction of a two-dimensional Maxwell equation for the surface phase.

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