1.15 Equations of State (5) S.J.T.U. Phase Transformation and Applications U=U(T,V) V=V(T,P) dU= d业a -n+ dU nr器 At constant pressure dP=0 w-en+[〔lm.】 [ D SJTU Thermodynamics of Materials Spring 2010 ©X.J.Jin Lecture 2 First Law llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2010 © X. J. Jin Lecture 2 First Law II 1.15 Equations of State (5) U U(T,V) dV V U d T P T U dU V T                     V V(T,P) d P P V d T P T V dV P T                                                                  d P P V d T T V V U d T P T U dU V T P T At constant pressure dP=0                                         P T P P V P d T T V V U d T T U dU T P U        