以相变过程为例探讨物理化学课程的可逆过程

Discussion on the Reversible Process of Physical Chemistry Course by Taking the Phase Change Process as an Example

可逆过程是物理化学课程常用的理想过程模型,被广泛应用在计算状态函数变化值的问题中。以过冷水变冰的不可逆相变过程为例探讨可逆过程的设计,展示应用公式的适用条件以及学生的解题思路,证明其熵变不等于热温商,提高学生对可逆过程的认识。

Reversible process is an ideal process model commonly used in physical chemistry course,which is widely used in the calculation of the change value of state functions.This paper discussed the design of reversible process by taking the irreversible transformation process of super-cooled water to ice as an example,also showed the applicable conditions of the applied formula and the students'solutions.The fact of that the entropy change of the process does not equal to the thermal temperature quotient was proved.The students’understanding of reversible process was improved.