A Carnot engine working between 300 K and 400 K has 800 J of useful work. The amount of heat energy supplied to the engine from the source is

Question

A Carnot engine working between 300 K and 400 K has 800 J of useful work. The amount of heat energy supplied to the engine from the source is, 2400 J, 3200 J, 1200 J, 3600 J

MARKS App · Accepted Answer

η = W o r k d o n e H e a t supplied ⁡ = T 1 - T 2 T 1 = W Q 1 W = 800 J , T 1 = 400 K , T 2 = 300 K On substituting the value 800 Q 1 = 400 - 300 400 = 100 400 = 1 4 Q 1 = 800 × 4 = 3200 J

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