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Confusion ?

  1. Apr 8, 2008 #1
    From the 1st law of thermodynamics we have

    dU = ∂Q+∂W

    but we also know

    dU = Tds - pdv ,

    i am confused about the + & - sign ?

    Is it because volume & pressure are inversely dependent on each other
  2. jcsd
  3. Apr 8, 2008 #2


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