1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Deriving the equation for lines of constant enthalpy

  1. Feb 16, 2013 #1
    How would one derive the equation for (dP/dV)H? That is the partial of P over the partial of V, holding H constant. I've tried many different things, triple product rule, maxwell relationships, and nothing seems to work. I appreciate any advice.
  2. jcsd
  3. Feb 19, 2013 #2
    You need to start with the equation of state, and write
    [tex]dT=(\frac{\partial T}{\partial P})_VdP+(\frac{\partial T}{\partial V})_PdV[/tex]

    You need to combine this with the equation:

    [tex]dH=C_PdT+(V-T(\frac{\partial V}{\partial T})_P)dP[/tex]
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook