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Carnot Cycle

If work done ...

Question

If work done by the system is $300$ joule when $100 c a l .$ heat is supplied to it. The change in internal energy during the process is;

A

- 200

J

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B

400

J

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C

720

J

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D

120

J

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Solution

The correct option is D $120$ J
Answer $D .$
$△ E = Q - W = 420 - 300 = 120 J$ $1 c a l = 4.2 J 100 c a l = 420 J .$

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