7.2.3 First Law of Thermodynamics(热力学第一定律) 系统- system 环境- surroundings 边界- boundary Suirroundings Boundary Sy stem tried m>s) FIGURE 7. 2 51 Thermodynamic system
7.2.3 First Law of Thermodynamics（热力学第一定律） 系统－system 环境-surroundings 边界-boundary
外界通过边界加于系统的热增量 6 外界对系统的做的功 Assume this system is stationary:(假定系统为静止的) satow=de (711) 要使系统产生内能增量de,有无数多种对系统做功和给系 统加热的方式(过程).- For a given de, there are in general an infinite number of different ways(processes) by which heat can be added and work done on the system
q ：外界通过边界加于系统的热增量 w ：外界对系统的做的功 q +w = de （7.11) 要使系统产生内能增量de，有无数多种对系统做功和给系 统加热的方式（过程）．--For a given de, there are in general an infinite number of different ways (processes) by which heat can be added and work done on the system. Assume this system is stationary: (假定系统为静止的)