热是一种特殊的自然现象,在日常生活中,有关热的现象是很多的,例如用锯子锯木块,锯条会热得烫手;电烙铁通以电流就会发热等等。物体的物理性质随温度发生变化的现象称为热现象,热学就是研究热现象的规律及其应用的科学。在对各种热现象的研究中,经常要用到的一个术语就是热量。这个物理量非常重要,但 Heat is a special natural phenomenon. In daily life, there are many phenomena related to heat. For example, when sawing a wooden block with a saw, the saw blade will be hot and hot; the electric iron will pass the current to generate heat and so on. The phenomenon that the physical properties of an object changes with temperature is called a thermal phenomenon. Thermal science is the study of the law of thermal phenomena and the science of its application. In the study of various thermal phenomena, one term often used is heat. This physical quantity is very important, but