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Entropy of the river due to coal heating

  1. Apr 24, 2012 #1
    Gamma (Cp/Cv) of a gas

    1. The problem statement, all variables and given/known data

    An experimenter adds 980 J of heat to 1.75 mols of an ideal gas to heat it from 10.0 C to 25.0 C at constant pressure. The gas does 234 J of work during the expansion. Calculate gamma (Cp/Cv) for the gas.

    2. Relevant equations

    Cv=Cp-nR
    Gamma =Cp/Cv

    3. The attempt at a solution

    No idea where to start. I found other ratios between the variables but I'm still confused. Do i have to use Q or delta Q?
     
    Last edited: Apr 24, 2012
  2. jcsd
  3. Apr 24, 2012 #2

    Andrew Mason

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    Re: Gamma (Cp/Cv) of a gas

    Apply the first law. Assume that it is a quasi-static process. What is ΔU? How does ΔU relate to Cv and ΔT? What is the difference between Cv and Cp? Answer all those questions and you will be able to determine Cp.

    AM
     
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