《物理化学》课程中的熵变计算问题探讨  

Study of Problems about Calculation of Entropy Change in Physical Chemistry

作　　者：陈益山 CHEN Yishan(School of Chemistry and Environmental Science,Qujing Normal University,Qujing Yunnan 655011,P.R.China)

机构地区：[1]曲靖师范学院化学与环境科学学院,云南曲靖655011

出　　处：《曲靖师范学院学报》2020年第6期45-49,共5页Journal of Qujing Normal University

基　　金：曲靖师范学院网络课程“物理化学1”(WLkc003).

摘　　要：系统熵变可用于判定过程的方向性,在热力学体系中占有重要地位,是教学的一个重点.同时熵变计算问题还具有多样性和灵活性的特点,是教学的一个难点.分别以可逆过程和不可逆过程熵变的计算、理想气体混合过程熵变的计算、体系和环境熵变的计算、循环过程熵变的计算这四类具体熵变计算问题为例,阐述如何通过灵活运用热力学第一、二定律的有关知识(尤其是跟熵有关的三个基本知识)来处理熵变计算问题.The entropy change of a system can be used to determine the direction of a process,which plays an important role in teaching thermodynamics.There are diversity and flexibility in the problems about calculation of entropy change,which are the difficulties in teaching.Four kinds of problems of calculation of entropy changes have been discussed by the case study of problems including entropy changes of reversible and irreversible process,entropy changes of mixing process of ideal gases,entropy changes of system and surroundings,and entropy changes of cyclic processes.How to solve the problems of entropy changes has been illustrated by using the related knowledge about the first and second law of thermodynamics,especially the three aspects of knowledge concerning entropy.

关 键 词：熵变计算 可逆过程 状态函数 

分 类 号：O642[理学—物理化学]