First slide

Heat ;work and internal energy

Question

An ideal mono atomic gas is taken round a cycle ABCDA as shown in figure, work done during the cycle is

Moderate

A

$2 P V$
B

$\frac{PV}{2}$
C

$P V$
D

$Z e r o$

Solution

Work done = area under rectangle ABCD
Area of rectangle = length x breadth
Area of rectangle=(2V-V)(2P-P)=VP
Work done = PV

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