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An ideal gas expand against a constant e...

An ideal gas expand against a constant external pressure at 2.0 atmosphere from 20 litre to 40 litre and absorb `10kJ` of energy from surrounding . What is the change in internal energy of the system ?

A

4052 J

B

5948 J

C

14052 J

D

9940 J

Text Solution

Verified by Experts

The correct Answer is:
B
`W = -P_("ext") (V_(2)-V_(1)) = -2 xx 20 = -40 lt -atm`
`=-40 xx 101.3 J =-4052` J
`DeltaU = q+w = 10000 - 4052 = 5948` J
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