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An electric heater supplies heat to a sy...

An electric heater supplies heat to a system of gas at a rate of 150 W. The system performs work at a rate of 50 J/s. At what rate is the internal energy increasing ?

Text Solution

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Heat supplied, Q = 150 J/s
System performs at a rate of 50 J/s
`" "` W = 50 J/s
By first law of thermodynamics
(Increase internal Energy)
`" "DeltaU=Q-W`
`" "DeltaU=150-50=100W`.
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