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If T₁ = 373 K and T₂ = 250 K, calculate the efficiency of the Carnot engine.

1. 0.25
2. 0.3
3. 0.4
4. 0.5

Correct answer: 0.4

Solution

The efficiency of a Carnot engine is given by η = 1 - (T₂/T₁). Substituting T₁ = 373 K and T₂ = 250 K, η = 1 - (250/373) ≈ 0.4.

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