饱和蒸汽压与液面曲率关系的微观解释

Micro-interpretation of Relationship Between Satuated Vapour Pressure and Curvature of Liquid Surface

关于弯曲液面上方的饱和蒸汽压对平面上方的饱和蒸汽压有一修正值,这在热力学中有过严格的证明,但从微观结构角度来加以解释尚未获得成功.本文提出了一种假想模型,认为液体表面存在一定数量的空位.按照这一模型,液体的某些表面现象,如表面张力、弯曲表面的饱和汽压等都能得到满意的说明.

There is a different value of saturated vapour pressure between the plane liquid surface and the curved one, namely an additional value (positive or negative). It was strictly proved in thermodynamics, but hasn't been explained successfully from the viewpoint of microscopic structure. This article proposes a hypothetical model: A number of vacancies exist in the surface layer of liquid. According to this assumption, some surface phenomenon of liquid such as surface tension, addional value of saturated vapour pressure of curved surface etc. can be demonstrated quite successfully.