PBL教学法在热力学第二定律教学中的尝试

Application of PBL Teaching Method to the Second Law of Thermodynamics

我们以基础化学中的两个常见例子——水的电离以及难溶盐的解离作为问题,进行了PBL教学法在物理化学课堂中的尝试,探讨了由此引申出的热力学基本概念如自发过程的方向和限度、化学平衡常数、标准态、化学平衡等问题。这对学生正确理解热力学第二定律、状态函数的概念、自发过程方向的判据以及可逆反应的定义具有很好的启发意义。

The PBL teaching method was first used in physical chemistry course with two simple examples,the dissociation of water and insoluble salt.The relevant definitions deriving from PBL teaching methods are discussed,including the orientation and limitation of the spontaneous process,chemical equilibrium constant,standard state and the chemical equilibrium.The discussion illuminates the students＇ understanding of the concept of state function,the criteria of direction of the spontaneous process and the definition of the reversible reaction.As a result,PBL teaching method has proved to be applicable in physical chemistry course.