mole of a perfect gas undergoes a cyclic process ABCA (see figure) consisting of the following processes -
: Isothermal expansion at temperature 
so that the volume is doubled from 
to 
and pressure changes from 
to 
.
C : Isobaric compression at pressure 
to initial volume 
.
: Isochoric change leading to change of pressure from 
to 
.
Total workdone in the complete cycle ABCA is -
Text Solution
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isotheraml process
isobaric process
isochoric process
also, 
work done by gas in the complete cycle ABCA is -
, as isochoric process
Now put the value of 
and 
in equation, we get
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