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Homework Help: What is the heat added to this monatomic ideal gas

  1. Feb 10, 2009 #1
    1. The problem statement, all variables and given/known data
    A monatomic ideal gas expands at a pressure of 110kPa and from a volume of 0.75m^3 to 0.93m^3. Find the amount of heat added to the gas.

    2. Relevant equations
    So what I did was:
    W= P∆V
    and I know ∆U= Q-W
    so Q would equal ∆U+W, but how do you know what ∆U equals?

    3. The attempt at a solution
  2. jcsd
  3. Feb 10, 2009 #2
    Re: Thermodynamics

    what are you assumptions? that will tell you what delta U is equal to.
  4. Feb 10, 2009 #3
    Re: Thermodynamics

    If I assume that this is at a constant pressure ∆U= 3/2nR∆T?, but since W=P∆V=nR∆T then ∆U= 3/2W?
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