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1st Law Work in a Turbine

  1. Jun 12, 2012 #1
    So I'm just a little confused with turbine work.

    Generally I've been solving it with first law -W = H2 - H1, so W = H1 - H2 = Cp(T1 - T2)

    But what about Q - W = U2 - U1?

    Can't that make it W = U1 - U2 = Cv(T1 - T2) giving a different answer. I have a feeling my understanding of something is amiss.
  2. jcsd
  3. Jun 12, 2012 #2
    Something in my head clicked and I'm guessing the Q - W = dU is only for closed systems?
  4. Jun 13, 2012 #3

    jack action

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