开放热力学系统麦氏关系的讨论

A Brief Discussion on the Maxwell Relation for an Open System

两个自变量的均匀封闭热力学系统麦氏关系可以用四个公式即(S/V)_T=(P/T)_V、(V/S)_P=(T/P)_S、(S/P_)T=-(V/T)_P、(T/V)_S=-(P/S)_V来表示、则三个自变量开放热力学系统麦氏关系可以用几个公式表示呢?文章把两个自变量的均匀封闭热力学系统麦氏关系推广到三个自变量开放热力学系统麦氏关系,对三个自变量开放热力学系统麦氏进行教学讨论。

The Maxwell relation for an uniform, closed thermodynamic system which has two independent variables can be described through the flolowing four formulas（ρS/ρV）T=（ρP/ρT）V、（ρV/ρS）P=（ρT/ρP）S 、（ρS/ρP）T=-（ρV/ρT）P、（ρT/ρV）S=-（ρP/ρS）V,and then what kind of description would be appropriate for the Maxwell relation for an open thermodynamic system with three independent variables？ In this paper, the Maxwell relation for a uniform, closed thermodynamic system with two variables is extended to the one for an open thermodynamic system with three variables, and an instructional discussion on this relation is presented..