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  4. Starting with the same initial conditions, an ideal gas expands from volume V1 to V2 in three different ways, the work done by the gas is W1 if the process is purely isothermal, W2 if purely isobaric and W3 if purely adiabatic, then

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Q. Starting with the same initial conditions, an ideal gas expands from volume V$_1$ to V$_2$ in three different ways, the work done by the gas is W$_1$ if the process is purely isothermal, W$_2$ if purely isobaric and W$_3$ if purely adiabatic, then

IIT JEEIIT JEE 2000Thermodynamics

Solution:

The corresponding p-V graphs (also called indicator diagram) in three different processes will be as shown :
Area under the graph gives the work done by the gas.
(Area )$_2$ > (Area)$_1$ > (Area )$_3$
$\therefore \, \, \, \, $ W$_2$ > W$_1$ > W$_3$

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