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Homework Help: Need help on heat engine!

  1. Dec 10, 2005 #1
    I really don't have any idea. Can someone shows me any direction of doing it?
  2. jcsd
  3. Dec 10, 2005 #2


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    Homework Helper

    Show it experimentally? good luck! see you in about 10 years ...

    Algebraically? starting with WHAT as your given statements?

    Logically? Most textbooks show that if some heat engine WAS more efficient
    than a reversible one, then the reversible one run backwards hooked up to the "super-efficient" one, would do mechanical Work endlessly.
    See "Carnot" in your index ...
  4. Dec 12, 2005 #3
    I have read "the carnot engine" and "2nd law" a lot of times, but I still can't figure out how to prove it!

    From the book:
    "If the more efficient engine is used to drive the Carnot engine as refrigerator, the net result would be transfer of heat from the cold to the hot reservoir."

    I don't understand this statement.

    please help!!
  5. Dec 13, 2005 #4
    can anyone explain the statement?
    urgent! please help
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