1.14 Joule-Thomson Coefficient S.J.T.0. Phase Transformation and Applications Joule-Thomson Coefficient defined as the change of temperature with pressure at constant enthalpy. ot aP System boundary H dm 国度计 P2,T 7777777777 Adiabatic process SJTU Thermodynamics of Materials Spring2008©X.J.Jin Lecture 2 First Law llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 2 First Law II 1.14 Joule-Thomson Coefficient Joule-Thomson Coefficient : defined as the change of temperature with pressure at constant enthalpy. System boundary mi mo H JT P T      Adiabatic process