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A gas is contained in a vessel fitted wi...

A gas is contained in a vessel fitted with a movable piston. The container is placed on a stove. A total of 100 cal of heat is given to the gas and the gas does 40 J of work in the expansion resulting from heating. Calculate the increase in internal energy in the process.

Text Solution

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Heat given to the gas is `DeltaU=DeltaQ-DeltaW`
`=418J-40J=378J`.
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