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Homework Help: Need help regarding finding out the max pressure in a isothermal cycle.

  1. Aug 16, 2007 #1
    A volume of 1.5 m3 of air initially at 1.31 bar and 293k undergoes three processes in order to complete a cycle:

    1 to 2 Isothermal compression from state 1 through a volumetric compression ratio of Rv to state 2
    2 to 3 Isobaric heating back to the original volume.
    3 to 1 Isochoric cooling back to state1.

    How do i find the max pressure in the cycle?

  2. jcsd
  3. Aug 16, 2007 #2


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    By knowing what the three iso.... words mean.
    You don't need any of the numbers or any equations - you just have to understand what the gas is doing.
  4. Aug 16, 2007 #3
    i know what the three iso's mean. could you supply a little more help plz
  5. Aug 16, 2007 #4


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    You need to know that PV/T = constant

    The gas is compressed but at the same temperature so pressure does up.

    Isobaric means no change in pressure.

    Volume is constant but cooled so pressure goes down.
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