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Ideal gas and Thermo question

  1. Feb 3, 2008 #1

    A chemical reaction is a gas mixture at 500 degrees C decreases the number of moles of gas, which is assumed to behave ideally, by 34.7%. If the internal energy change is 23.8 kJ, what is the value of dH.

    2. Relevant equations

    Not sure if they are complete relevant but...
    d(PV) = d(nRT)
    dH = dE + d(PV)

    3. The attempt at a solution

    So...what I was thinking of doing was using dH = dE + dPV.

    We are given dE. To find d(PV), I was thinking of using d(nRT), because it tells us the change in moles. I feel that I'm close, but I know that you can't just put in the change in percent for the change in moles.
  2. jcsd

Can you offer guidance or do you also need help?
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