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Heat and work

  1. May 21, 2014 #1
    My book states:

    ''An engine is a device that turns heat energy into work''

    I know the definitions of both heat and work (heat is the energy transferred by virtue of a temperature difference and work is the energy transferred when a force acts through a distance) but I'm struggling to understand the above. Could anyone elaborate on the above?

  2. jcsd
  3. May 21, 2014 #2


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    Science Advisor

    What exactly about the statement is confusing you?
  4. May 21, 2014 #3
    How is this done? I mean both are forms of energy? So how is heat converted to work?
  5. May 21, 2014 #4
    In practice it is done like that: Heat warms up a gas that expands producing work on a piston.
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