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Komal Dhillon
Asked: 2022-11-06T20:38:13+05:30 In:

A gas expands against a variable pressure given by `P=(20)/(V)` bar. During expainsion from volume of `1` litre to `10` litre, the gas undergoes a change in internal energy of `400 J`. Heat absorbed by the gas during expansion ( in `KJ`):

A gas expands against a variable pressure given by `P=(20)/(V)` bar. During expainsion from volume of `1` litre to `10` litre, the gas undergoes a change in internal energy of `400 J`. Heat absorbed by the gas during expansion ( in `KJ`):
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  1. Correct Answer – 5
    `Delta W=underset(1)overset(-10)intPdv= -20underset(1)overset(10)int(dv)/(V)=20[ l n(V)]_(1)^(10)= -20 ln(10)= -4605 J`
    `Delta q=Delta U-Delta w`
    `= 400-(-4605)=5005 J ~~ 5 KJ`

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