物理与工程2025，Vol.35Issue(1)：42-45,4.
两体热传导过程中熵增的几种证法及评注
SEVERAL PROOFS AND COMMENTARY ON ENTROPY INCREASE DURING TWO-BODY HEAT CONDUCTION
摘要
Abstract
The process of thermal contact between two objects at different temperatures in an isolated system is an irreversible process,hence the entropy of the system will increase during this process.Existing textbooks do not provide a rigorous proof for this conclusion.Lima's published paper offers an elegant and concise proof,but there are still two issues with the proof:1.It assumes that the heat capacity of the object is a constant,which is not true in most real situations.2.The proof process uses an inequality about the concavity of a function's curve,which is still relatively obscure to beginners.This paper provides two alter-native proofs that are more rigorous and intuitively simple for the first issue,and for the second is-sue,it offers another proof using elementary geometric methods for reference by beginners.关键词
热传导/熵增加原理/热力学第二定律Key words
heat conduction/entropy increase principle/second law of thermodynamics引用本文复制引用
何小勇,李品钧,叶海..两体热传导过程中熵增的几种证法及评注[J].物理与工程,2025,35(1):42-45,4.基金项目
广东省本科高校教学质量与教学改革工程建设项目"光电子学课程教学改革研究"(粤教高函[2021]29号). （粤教高函[2021]29号）
