热力学与统计物理 金晓峰 复旦大学物理系 2005-4-6
2021/8/21 1 热力学与统计物理 金晓峰 复旦大学物理系 2005-4-6
doren 0 T 二 FIGURE 20-11 Any reversible cycle can be approximated as a series of Carnot cycles (The dashed lines represent isotherms
= 0 T dQrev
do ds T FIGURE 20-12 The integral, ds, of the entropy for a reversible cycle is zero. Hence the difference in entropy between states a and b ∫adS, is the same for path I as for path II
T dQ dS =
do SB- SA T FIGURE 20-12 The integral, ds, of the entropy for a reversible cycle is zero. Hence the difference in entropy between states a and b ∫adS, is the same for path I as for path II
− B A B A T dQ S S
热力学第二定律 对孤立系统:ds≥0(uv固定 达到平衡态的条件:S=Smax 对排孤立系统?
dS 0 热力学第二定律 对孤立系统： 达到平衡态的条件： S = Smax 对非孤立系统 ？ （U, V 固定）