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Blowing up a balloon (thermodynamics and maybe ideal gases)

  1. Oct 7, 2012 #1
    1. The problem statement, all variables and given/known data
    A balloon behaves such that the pressure is P = CV3
    where C
    = 100 kPa/m3
    . The balloon is blown up with air from a starting volume of 1 m3
    to a volume
    of 3 m3
    . Find the work done by the air.


    2. Relevant equations
    W=PdV



    3. The attempt at a solution

    What I tried is simply trying the above solution by multiplying the P which is given by P=CV^3 by the change in volume

    so i got

    W=(CV^3)(Vf-Vi)

    I then realized I had no idea what would the V in this equation be, can someone tell me if I am even doing this question right and if I am how I can determine the V?

    Thanks
     
  2. jcsd
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