1.15 Equations of State (3) S.J.T.U. Phase Transformation and Applications Joule-Thomson coefficient for an ideal gas. aH af 门r= T =0 OH OT)p SJTU Thermodynamics of Materials Fall 2012 ©X.J.Jin Lecture 2 First Law llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2012 © X. J. Jin Lecture 2 First Law II 1.15 Equations of State (3) Joule-Thomson coefficient for an ideal gas.   0        P T H  0                            P T H JT T H P H P T 