1. Not finding help here? Sign up for a free 30min 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!

+ instead of - for Maxwell Relation?

  1. Mar 13, 2007 #1
    In the lecture notes


    on the very last page, should the second realisation relation have -(dU/dp) instead of the + (dU/dp)?
    Last edited: Mar 13, 2007
  2. jcsd
  3. Mar 13, 2007 #2


    User Avatar
    Homework Helper
    Gold Member

    You need to fix the link. I get a 404 error.
  4. Mar 13, 2007 #3
  5. Mar 13, 2007 #4
    I have derived it again and realised that I used the wrong dQ. It should have been dQ=dU-dW whereas I used dQ=dU+dW.
  6. Mar 14, 2007 #5
    First Law applications can be an enormous pain in the ass - some people sometimes define dQ and dW as either done ON the system or done BY the system quite arbitrarily - which of course changes their sign.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook