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The figure shows a PV diagram for 2.69 mole of oxygen gas in a sealed

  1. Apr 22, 2013 #1
    1. The problem statement, all variables and given/known data
    The figure shows a PV diagram for 2.69 mole of oxygen gas in a sealed container. The temperature of state 1 is 21 C. Pressure is Pi. What is T3 and T4?
    http://s74.photobucket.com/user/teysure/media/phyiscs.png.html?sort=3&o=0





    my attempt at solving the solution:
    T3 - P1V1/T1 = P3V3/T3
    (1Pi)(.100l)/294K = (1.5Pi)(.05l)/T2
    T2 = 220.5K - 273 = 52.5K

    T4 - V3/T3 = V4/T4
    (.05l)/(220.5K) = (.150l)/(T4)
    T4 = 661.5K = 388.5C
     
  2. jcsd
  3. Apr 23, 2013 #2

    ehild

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    When you calculated T3, you made a sign error. 220.5 - 273 is a negative number, and the result is in degrees °C.
     
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