温度和热量 S.J.T.U. Phase Transformation and Applications 温度：热的强度 热量：热传递的数量 水位/储水量 一个容器内水位的高低固然与储水量有关，还与容器的 大小即横截面有关。容器的大小相当于热量的概念。 The concept of temperature is as fundamental a physical concept as the three fundamental quantities of mechanics-mass,length,and time.Through the study of such practical problems as how to make a highly efficient steam engine,fundamental physical theories emerge,including the concepts of the quantum theory and the two laws of thermodynamics.The second law,with its irreversibility requirement, predicts an inevitable evolution from other forms of energy into heat.It is the second law alone that provides an "arrow"for the concept of time. http://eo.ucar.edu/skymath/tmp2.html#Uni SJTU Thermodynamics of Materials Spring 2010 ©X.J.Jin Lecture 1 First law I 14/38Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2010 © X. J. Jin Lecture 1 First law I 14/38 温度和热量 温度：热的强度 热量：热传递的数量 水位/储水量 一个容器内水位的高低固然与储水量有关，还与容器的 大小即横截面有关。容器的大小相当于热量的概念。 The concept of temperature is as fundamental a physical concept as the three fundamental quantities of mechanics - mass, length, and time. Through the study of such practical problems as how to make a highly efficient steam engine, fundamental physical theories emerge, including the concepts of the quantum theory and the two laws of thermodynamics. The second law, with its irreversibility requirement, predicts an inevitable evolution from other forms of energy into heat. It is the second law alone that provides an "arrow" for the concept of time. http://eo.ucar.edu/skymath/tmp2.html#Uni