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  1. A

    Heat engine/thermal efficiency question

    I figured it out. You're right, I did miscalculate one of the Q's. At the beginning, I calculated QH (or Q23) to be 303J but I know now that was where I went wrong, so I managed to get the right answer now. Thanks for all your trouble :)
  2. A

    Heat engine/thermal efficiency question

    Homework Statement The figure shows the cycle for a heat engine that uses a gas having gamma =1.25. The initial temperature is T1=300K, and this engine operates at 20 cycles per second. What is the engine's thermal efficiency...
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