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A Carnot engine working between 300 K and 600 K has a work output of 800 J per cycle. The amount of heat energy supplied to the engine from source per cycle is ___________

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A Carnot engine working between 300 K and 600 K has a work output of 800 J per cycle. The amount of heat energy supplied to the engine from source per cycle is ___________

(a) 1200J

(b) 1600J

(c) 2400J

(d) 3200J

I had been asked this question in a job interview.

My query is from Thermodynamics topic in chapter Kinetic Theory of Gases of Engineering Physics I

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The correct answer is (b) 1600J

Explanation: Ƞ=W/Q1 =1-T2/T1 =1-300/600=1/2

Q1=2W=2×800=1600J.

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