抽象 S.J.T.0. Phase Transformation and Applications Energy as work V Carnot engine: Quasistatically,reversible 低温热源为什么要存在？ SJTU Thermodynamics of Materials Fall 2012 @X.J.Jin Lecture 4 Second law llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2012 © X. J. Jin Lecture 4 Second law II 抽象 Carnot engine: Quasistatically, reversible 低温热源为什么要存在？