恒温下熵变的计算(1) S.J.T.U. Phase Transformation and Applications s-s-fs=器 dp p.65,2.13 EX:ideal gas R PV-RT 器)- dS=- R P 恒温下，当压力改变时，将引起熵变 For a change in pressure from 1 atm to 10 atm at constant pressure. AS--fRP--RIn P--RIn10--19.14J/(mol-K) SJTU Thermodynamics of Materials Spring2010©X.J.Jin Lecture 6 Property Relation llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2010 © X. J. Jin Lecture 6 Property Relation II 恒温下熵变的计算(1) T T P V P S                                 2 1 2 1 2 1 P P P dP T V S S d S EX: ideal gas dP P R dS P R P S P R T V PV RT P T                       For a change in pressure from 1 atm to 10 atm at constant pressure. R P R J mol K P dP S R P P            ln ln10 19.14 / 1 0 1 2 1 恒温下，当压力改变时，将引起熵变 p.65, 2.13