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Engine Possibility

  1. Dec 8, 2007 #1
    Is it possible for an engine to have a heat imput per second of 9kJ (Qh) at 375K (T) and a heat output per second of 4kJ (Ql) at 225K (T)? Offhand it seems probable; the engine has an exhaust and does not violate the second law of thermodynamics, however, I'm not sure of what equation would help me determine whether or not this is possible.
    Last edited: Dec 8, 2007
  2. jcsd
  3. Dec 8, 2007 #2


    Staff: Mentor

    I would guess that you could compare it to a Carnot cycle ( http://en.wikipedia.org/wiki/Carnot_cycle ) and see if it is no more efficient than that. If it is more efficient than a Carnot cycle then it is impossible.
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