A sample of gas expands from volume ${V_1}$ to ${V_2}$. The amount of work done by the gas is greatest when the expansion is
A
Isothermal
B
Isobaric
C
Adiabatic
D
Equal in all cases
AIIMS 1998,AIPMT 1997, Medium
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B
Isobaric
b (a) In thermodynamic process, work done is equal to the area covered by the $PV$ curve with volume axis.
Hence, according to graph shown
${W_{adiabatic}} < {W_{isothermal}} < {W_{isobaric}}$
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