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Homework Help: Net Energy

  1. Feb 18, 2006 #1
    i figured out that
    Wac=21000J
    Wbc=0
    Wab=91000J

    how do you find internal enegy of U=Q+W?
     

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  2. jcsd
  3. Feb 19, 2006 #2

    lightgrav

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    Homework Helper

    It is the CHANGE of Internal Energy that is a process quantity,
    related to other process quantities like Work and Heat.
    If this is a "thermally isolated system" or the steps happen "quickly",
    then you treat Q = 0 . If it happens "slowly" or at known Temperature,
    then you know T and should calculate I.E. from T (depending on the kind of gas)
     
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