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When 110J of heat is supplied to a gaseo...

When 110J of heat is supplied to a gaseous system, the internal energy of the system increase by 40J. The amount of external work done (in J) is

A

150

B

70

C

110

D

40

Text Solution

Verified by Experts

The correct Answer is:
B
According to first law of thermodynamics,
`dQ = dU+dW`
or, `dW = dQ-dU = 110-40 = 70 J`
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CHHAYA PUBLICATION-FIRST AND SECOND LAW OF THERMODYNAMICS-Examination Archive with solution (WBCHSE)
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