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Engine efficiency

  1. Sep 17, 2008 #1
    uh...just wondering but how do you find out the efficiency from a P-V graph?
  2. jcsd
  3. Sep 18, 2008 #2
    depends on the engine's process
  4. Sep 18, 2008 #3
    The figure is a PV diagram for a reversible heat engine in which 1.0 mol of argon, a nearly ideal monatomic gas, is initially at STP (point a). Points b and c are on an isotherm at T = 423 K. Process ab is at constant volume, process ac at constant pressure.

    How would I go about finding the efficiency from such a graph?
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