In a certain thermodynamical process, the pressure of a gas depends on its volume as k V 3 . The work done…

In a certain thermodynamical process, the pressure of a gas depends on its volume as kV3. The work done when the temperature changes from 100 °C to 300 °C will be xnR where n denotes number of moles of a gas find x ;

Solution

P=kV3

Ti=100 °C & Tf=300 °C

ΔT=300-100

ΔT=200 °C

P=kV3

now PV=nRT

 kV4=nRT

now 4kV3dV=nRdT

  PdV=nRdT/4

Work =PdV=nRdT4=nR4ΔT

=2004×nR=50nR

Asked in: JEE Main 2021 (25 Feb Shift 1)

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