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Thermodynamics- validity of change of internal energy equation

  1. Jun 7, 2010 #1
    Just had a thermodynamics exam, and one of the questions was

    For an ideal gas, is the relation [tex]\Delta[/tex]U = mC[tex]_{}v[/tex][tex]\Delta[/tex]T restricted to constant volume processes only? Why?

    I wrote that it was only valid for constant volume processes, because this is what C[tex]_{}V[/tex] is defined as, however now i'm starting to think that is only true for Q, and that equation is true for any process, not just constant volume.

    thanks in advance!
  2. jcsd
  3. Jun 7, 2010 #2
    oops, meant to be subscript v's obviously :)
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