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Homework Help: No clue, Thermochemistry

  1. Oct 20, 2007 #1
    1. For a certain reaction at constant pressure, delta U= -72 KJ, and 39KJ of expansion work is done by the system. What is delta H for this process.

    2. I basically have no idea what to do because it's not in my textbook and my professor has never taught this. Maybe If I knew what the delta U stood for I could understand it.


    Edit: Wild guess, answer is -111 KJ?
    Last edited: Oct 20, 2007
  2. jcsd
  3. Oct 20, 2007 #2
    Anybody know what the damn delta U supposed to signify
  4. Oct 20, 2007 #3


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  5. Oct 20, 2007 #4
    No, It does not. In my book this is the only way this is written [tex]\Delta{H}\,=\,\Delta{E}\,+\,P\Delta{V}[/tex] My guess was that it stood for E but i wasnt sure. Does that I am right?
  6. Oct 20, 2007 #5
    yes, some places use U and some use E, they are the same
  7. Oct 20, 2007 #6
    Okay, Thanks

    Edit: Are you stalking my posts eli64 :rofl:
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