1.14 Joule-Thomson Coefficient S.J.T.U. Phase Transformation and Applications Joule-Thomson Coefficient defined as the change of temperature with pressure at constant enthalpy. ot System boundary H 温度计 P:.T 777777777 Adiabatic process SJTU Thermodynamics of Materials Spring2006©X.J.Jin Lecture 2 First Law llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © 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 δmi δmo H JT P T ⎟⎠⎞ ⎜⎝⎛ ∂∂ η = Adiabatic process