近年来国内外出版的一些物理化学教科书引入了反应进度(extent of reaction)的概念,只用于讨论化学平衡、反应速率等问题,在热化学中没有涉及反应进度的概念。仅M.L.McGlashan的Chemical Thermodynamics在热化学中提及到反应进度的概念,但对一些基础的定义、公式没有详细的讨论。在热化学教学中引入反应进度的概念,使一些概念表达准确简明,基本定律、公式推证 In recent years, some physicist textbooks published at home and abroad have introduced the concept of extent of reaction, which is only used to discuss the problems of chemical equilibrium and reaction rate. There is no conception about the progress of reaction in thermochemistry. Only the chemical thermodynamics of M.L. McGlashan mentions the concept of reaction progress in thermochemistry, but for some basic definitions, formulas are not discussed in detail. Introduced the concept of reaction progress in the teaching of thermochemistry, made the accurate and concise expression of some concepts, the basic law, the deduction of formula