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热力学定律与能量守恒定律是“选修3-3”的主干知识,许多省份作为高考的必考内容,一般以选项题的形式出现,主要考查以下几个知识点.考向一对热力学第一定律的理解1.改变内能的两种方法:做功和热传递(1)两种方法的区别:热传递是指内能在物体之间转移(由高温物体转移到低温物体),做功过程中,其它形式的能与内能相互转化.做功和热传递都能改变物体的内能,效果相同.(2)内能与热量区别:内能是状态量,热量是过程量;只有
The law of thermodynamics and the law of conservation of energy are the backbone of “elective 3-3 ”, many provinces as the exam content of the college entrance examination, usually in the form of option questions, mainly to examine the following points of knowledge.Considering to a pair of thermodynamics A law of understanding 1. Two ways to change the internal energy: work and heat transfer (1) the difference between the two methods: heat transfer refers to the transfer of energy within the object (from high temperature objects to low temperature objects), work process , And other forms of internal energy can be transformed into each other. Both work and heat transfer can change the internal energy of objects, the same effect. (2) the difference between internal energy and heat: internal energy is the state quantity, heat is the process of volume; only