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In a thermodynamics process, pressure of...

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

A

`30 J`

B

`20 J`

C

`60 J`

D

`40 J`

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