7-1 Entropy 7-2 the increase of entropy principle (熵增原理) 7-3 Entropy change of pure substances (tables) 7-4 Isentropic processes (等熵过程) 7-5 Property diagrams involving entropy (T-S) (H-S) 7-6 what is entropy? 7-7 The T ds relations 7-8 ENTROPY CHANGE OF LIQUIDS AND SOLIDS 7-9 THE ENTROPY CHANGE OF IDEAL GASES 7-10 REVERSIBLE STEADY-FLOW WORK 7-11 MINIMIZING THE COMPRESSOR WORK