physics

A Carnot engine is operated between two heat reservoirs at temperatures 520 K and 300 K. (a) If the engine receives 6.45 kJ of heat energy from the reservoir at 520 K in each cycle, how many joules per cycle does it reject to the reservoir at 300 K? (b) How much mechanical work is performed by the engine during each cycle? (c) What is the thermal efficiency of the engine?

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asked by Jen
  1. For a Carnot engine,

    Qin/Qout = Tin/Tout = 520/300 = 1.733

    Wout = Qin - Qout = Qin[1 - Qout/Qin]
    = Qin[1 - (Tout/Tin)] = ___
    Efficiency = Wout/Qin = __

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    posted by drwls
  2. .935

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    posted by garret

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