Question

heat applied to system = 100W , wprk done = 75 j find ∆u ?​

Answer 1

Applying Required Formula :

• ∆Q = 100 W = 100j / s

• ∆w = 75 j / s

[ ∆Q = ∆u - ∆w ]

• ∆u = ∆Q - ∆w

• ∆u = 100 - 75 J / s

• Value of ∆u = 25 J /S

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Answer 2

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By law of conservation of energy,

Total energy= Work done + Internal Energy

100=75+U=25 J/s

Hence, Internal energy is increasing at the rate of 25 W