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NEET2017PhysicsThermodynamicsActual

The temperature of source and sink of a heat engine are 127^ C and 27^ C , respectively. An inventor claims its efficiency to be 26 % , then

Options

  1. Ait is impossible
  2. Bit is possible with high probability
  3. Cit is possible with low probability
  4. DData are insufficient

Correct answer

A. it is impossible

Step-by-step solution

Efficiency of heat engine is =1- T₂ T₁ or = T₁-T₂ T₁ Here, T₁=273+127=400 ~K aligned & T₂=273+27=300 ~K & = 400-300 400 = 100 400 =0.25=25 % aligned Hence, 26 % efficiency is impossible for a given heat engine.

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