热学是研究物质的热性质和物质热运动的规律及其应用的一门学科,是物理学的一个重要分支.热学知识在实际中有重要的应用.中学物理中编入这一内容,其目的在于提出研究热现象的两种不同方法.一种是从宏观上总结热现象的规律,引入内能的概念,并把内能跟其他形式的能量联系起来;另 Thermal science is a discipline that studies the laws of the thermal properties of matter and the thermal movement of matter and its applications. It is an important branch of physics. Thermal knowledge has important applications in practice. This content is included in the middle school physics, its purpose It is to propose two different methods for studying thermal phenomena. One is to summarize the laws of thermal phenomena from a macroscopic perspective, introduce the concept of internal energy, and connect internal energy with other forms of energy;