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Homework Help: Thermodynamics Isotherm

  1. Nov 17, 2011 #1
    1. The problem statement, all variables and given/known data

    Gas temperature 30C, volume 20cm3 and pressure 2*10^5. We have isothermal change and volume goes to 27cm3, whats the change of pressure?

    2. Relevant equations


    3. The attempt at a solution

    (20*10^-6*2*10^5)/30 and then we get constant. p1*V1=const -> p1=const/V1
  2. jcsd
  3. Nov 17, 2011 #2
    Note that the temperature must be in units of K i.e.(30 + 273).
  4. Nov 17, 2011 #3
    But one does not need the value of temperature. Just use PV = constant.
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