表面张力和表面吉布斯自由能的严格证明  

Strict Proof of the Identity of Surface Tension and Surface Gibbs Free Energy

作　　者：苗碗根[1] 莫春生[1] 

机构地区：[1]湛江师范学院化学科学与技术学院,广东湛江524048

出　　处：《广东化工》2008年第2期33-34,共2页Guangdong Chemical Industry

摘　　要：表面张力和表面吉布斯自由能是界面现象中非常重要的两个概念,表面张力定义为垂直作用在单位长度界面上的力,而表面吉布斯自由能是定温定压条件下,增加单位表面积引起系统吉布斯自由能的增量,实际上它们是从不同角度观察表面现象的同一物理量,但各教材中基本上没有详细的论述。文章从吉布斯自由能的实际意义角度对两者同一性进行严格的证明。Surface tension and surface Gibbs free energy are of great importance in interfacial phenomena. The surface tension is defined as the force that act on interface in unit length vertically, while the surface Gibbs free energy is decribed as the change of systemic Gibbs free energy along with the increasing unit surface area at the condition of constant pressure and temperature. In fact, they are the identical quantities from different observational angles. However, the identity of them was not elucidated in books of physical chemistry in details. In the paper, the strict proof of the identity of surface tension and surface Gibbs free energy was present.

关 键 词：表面张力 表面吉布斯自由能 界面现象 同一性 

分 类 号：O642.1[理学—物理化学] O647.1[理学—化学]