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QJEEM21Ph2431: JEE Main 2021 Physics - Class 11 JEEM21Ph2431 Solution: The P-V diagram of a diatomic ideal gas system going under…

The P-V diagram of a diatomic ideal gas system going under cyclic process as shown in figure. The work done during an adiabatic process CD is (use γ\gamma = 1.4) :

JEE Main 2021 (Online) 18th March Morning Shift Physics - Heat and Thermodynamics Question 224 English

Multiple Choice Options

  • A −- 500 J
  • B −- 400 J
  • C 400 J
  • D 200 J

Step-by-Step Verified Solution

Adiabatic process is from C to D

WD=P2V2−P1V11−γWD = {{{P_2}{V_2} - {P_1}{V_1}} \over {1 - \gamma }}

=PDVD−PCVC1−γ= {{{P_D}{V_D} - {P_C}{V_C}} \over {1 - \gamma }}

=200(3)−(100)(4)1−1.4= {{200(3) - (100)(4)} \over {1 - 1.4}}

= −- 500 J

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