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 = 1.4) :

Engineering

Physics

Work Done by a Central Force

Question

200 J

–500 J

–400 J

400 J

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Adiabatic process is from C to D

$WD = \frac{P_{2} V_{2} - P_{1} V_{1}}{1 - γ}$

$= \frac{P_{D} V_{D} - P_{C} V_{C}}{1 - γ}$

$= \frac{200 (3) - (100) (4)}{1 - 1 .4}$

= –500 J

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