热学是研究大量分子的集体所表现出来的现象和规律。学习热学可以使我们对物质结构,物质特性和物质的运动有更深一步的认识。同时,热学与国民经济的关系也极为密切,日常生活,工农业生产的很多方面都与热现象有关,从古老的蒸汽机到近代的火箭、喷气机都属于热学的研究和应用范畴。 Thermal science is the phenomenon and laws that are manifested in the collective study of a large number of molecules. Learning thermals allows us to have a deeper understanding of the structure of matter, the properties of matter, and the movement of matter. At the same time, the relationship between thermal science and the national economy is also very close. Many aspects of daily life and industrial and agricultural production are related to thermal phenomena. From the old steam engine to modern rockets and jets, it belongs to the field of thermal research and application.