A thermodynamic system is taken from an original state D to an intermediate state E by the linear process shown in (figure)

Its volume is then reduced to the original value from E to D via F by an isobaric process. Calculate the total work done by the gas from D to E to F to D.

Explanation

`"Total work done by the gas from" D " to " E " to " F = "Area of" DeltaDEF`
`"Area of" DeltaDEF=(1)/(2)DExxEF`
Where,
DF = Change in pressure
`=600N//m^(2)-300N//m^(2)`
`=300N//m^(2)`
FE = Change in volume
`=5.0m^(3)-2.0m^(3)`
`=3.0m^(3)`
`"Area of" DeltaDEF=(1)/(2)xx300xx3=450J`
Therefore, the total work done by the gas from D to E to F is 450 J.