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In thermodynamic process, pressure of a ...

In thermodynamic process, pressure of a fixed mass of a gas is changes in such a manner that the gas molecules gives out 20 J of heat and 10 J of work is done in the gas. If the initial internal energy of the gas was 40 J, then the final internal energy will be

A

0

B

80 J

C

20 J

D

`-20` J

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