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A Carnot engine, whose efficiency is 40 % , takes in heat from a source maintained at a temperature of 500 ~K It is desired to have an engine of efficiency 60 % . Then, the intake temperature for the same exhaust (sink) temperature must be

Options

  1. Aefficiency of Carnot engine cannot be made larger than 50 %
  2. B1200 ~K
  3. C750 ~K
  4. D600 ~K

Correct answer

C. 750 ~K

Step-by-step solution

40 100 = 500-T_S 500 , T_S=300 ~K 600 100 = T-300 T T=750 ~K

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