11th Class Physics Thermodynamical Processes Question Bank Thermodynamics Conceptual Problems

  • question_answer
    No real engine can have an efficiency greater than that of a Carnot engine working between the same two temperatures. Give reason.

    Answer:

                    A Carnot engine is an ideal engine satisfying the following conditions: (i) There is no friction between the walls of the cylinder and the piston. (ii) The working substance is an ideal gas. That is the gas molecules have point sizes and have no attractive forces between them. Real engines cannot fulfil these conditions. Hence no heat engine working between the same two temperatures can have efficiency greater than that of a Carnot engine.


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