Question

The temprature - entropy diagram of a reversible engine cycle is given in the figure . its efficiency is

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Answer 1

Explanation:- According to the figure ,

For process 1

Q₁ = T₀S₀ + 1/2T₀S₀ = 3/2T₀S₀

For process 2

Q₂ = T₀(2S₀ - S₀) = T₀S₀

For process 3

η = W/Q₁ = Q₁ - Q₂ / Q₁

⟹ 1- Q₂/Q₁

⟹ 1- 2/3 = 1/3 Answer