关于自由能的一些讨论  

A discussion on free energy

作　　者：郭革新[1] 周国香[1] 王爱坤[1] 何文辰[1] 

机构地区：[1]河北工业大学理学院

出　　处：《大学物理》2004年第6期19-22,共4页College Physics

摘　　要：给出了自由能函数的完整表达式,并说明了自由能展开式中各项的物理意义.指出了自由能展开式系数及自变量的共轭变量的意义,吉布斯自由能的一阶偏导数都是热力学变量;吉布斯自由能的二阶偏导数一律都是物性张量.讨论了相变过程中的自由能函数展开式应保留的项数等,还给出了相稳定性条件.The full expression of free energy is proposed,and the physical significance of every part of this expansion are illustrated. The significance of the coefficients of this expansion and that of conjugate variable of the independent variable are indicated;i. e. the first order partial differential of Gibbs free energy are thermodynamics variables,and the second order partial differential of Gibbs free energy are substance property tensors. The term numbers of free energy expansions are studied during the phase transition process. Besides,the stability condition of the phase is analyzed.

关 键 词：自由能 展开式 相变 Landau理论 

分 类 号：O414.13[理学—理论物理]