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Homework Help: Thermodynamic Work

  1. Jan 19, 2009 #1
    1. The problem statement, all variables and given/known data
    The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 2.5 multiplied by 105 Pa, and the horizontal divisions represent 1.5 multiplied by 10-3 m3. Determine the work done (including algebraic sign) in each segment of the path.

    (c) C to A

    3. The attempt at a solution
    Isn't it just the area under the curve from C to A? Area of a trapezoid? 5625 J?
  2. jcsd
  3. Jan 19, 2009 #2

    Andrew Mason

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    Not quite. Is work being done by the gas or on the gas? What does this do to the sign of the area/work?

  4. Jan 19, 2009 #3
    Ahh. I see. Since the volume is decreasing the work done by the gas is negative.

    Thank you for the help.
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