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Homework Help: Carnot cycle

  1. Jul 31, 2015 #1
    1.what is the work done in an adiabatic compression process in a carnot cycle

    when we consider work done in efficiency why do we take heat exchange into account i.e.,qs-qr

    3. The attempt at a solution
  2. jcsd
  3. Jul 31, 2015 #2
    Is it a homework question?

    Anyways efficiency is measured by output you get from the machine divided by input you give to the machine. The heat change indicates the amount of heat transformed into work. Relate first law of thermodynamics.
  4. Jul 31, 2015 #3
  5. Mar 23, 2016 #4
    We consider the standard Carnot-cycle which can be thought of as having a piston moving within a cylinder, and having the following characteristics:

    • A perfect seal, so that no atoms escape from the working fluid as the piston moves to expand or compress it.

    • Perfect lubrication, so that there is no friction.

    • An ideal-gas for the working fluid.

    • Perfect thermal connection at any time either to one or to none of two reservoirs, which are at two different temperatures, with perfect thermal insulation isolating it from all other heat transfers.

    • The piston moves back and forth repeatedly, in a cycle of alternating "isothermal" and "adiabatic" expansions and compressions
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