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Thermodynamic Processes

A thermodynam...

Question

A thermodynamic process, 200 J of heat is given to a gas and 100 J of work is also done on it. The change in internal energy of the gas is

A

100 J

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B

300 J

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C

419 J

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D

24 J

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Solution

The correct option is A 100 J
$Δ U = Q - W$ [From !st law of thermodynamics]
$Q = 200 J$
$W = 100 J$
$∴ Δ U = (200 - 100) J = 100 J$

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