First slide

Work done by gas

Question

A sample of ideal monoatomic gas is taken round the cycle ABCA as shown in fig. The work done during the cycle is

Moderate

A

zero
B

3 PV
C

6 PV
D

9 PV

Solution

Work done = area enclosed
$\begin{aligned} = \frac{1}{2} (3 V â V) (4 P â P) \\ = \frac{1}{2} Ã 2 V Ã 3 P = 3 PV \end{aligned}$

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