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Homework Help: Isothermal compression of ideal gas

  1. Oct 22, 2007 #1
    1. The problem statement, all variables and given/known data
    http://img144.imageshack.us/img144/7374/90628634mn7.jpg [Broken]

    Attempted Answer
    I got this formula out of our textbook
    Because Isothermal:


    Therefore the first equation can be written as:

    From this equation I worked the boundary work to be: 1364.4kJ. Using the following values: m=3kg, R = 0.4882, P(1) = 1400kpa, T(1) = 353K, V(1) = 0.369288 (meters cubed).

    Now I have boundary work to be 1364.4kJ and Q(in) = 495 (kJ/kg) x 3kg = 1485kJ

    To find the change in enthalpy dont I just add these values? I am not sure what I have done wrong.

    The answers are:
    Last edited by a moderator: May 3, 2017
  2. jcsd
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