自聚集星体的内能和它的熵的演化

首先从热力学角度阐述了系统内能的本质涵义;进一步又对自引力系统(尤其是球对称自引力系统)阐明了自引力系统内能的涵义;最后又以球对称自引力系统为例具体地分析了自引力系统熵的演化取决于系统内能所处的能态,当系统的能态为正能态时,系统的熵按熵增原理演化,反之,当系统的内能处于负能态时,系统的熵必然按熵减原理演化.

Abstract：

In this paper,the meaning of the internal energy of a system is expounded from the perspective of thermodynamics,and then the meaning of the internal energy of a self-gravitational system,particularly,a spherical symmetric self-gravitational system,is demonstrated.Finally,the spherical symmetric selfgravitational system is taken as an example to illustrate that the evolution of entropy of a self-gravitational system is determined by the energy state(or the energy spectrum)of the system.If the system is in the positive energy state,its evolution will follow the principle of entropy increase.Conversely,if the system is in the negative energy state,its evolution will follow the principle of entropy decrease.

The Internal Energy of Self-Collective Stars and the Evolution of Their Entropy