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Thermodynamics

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Question : 9 of 10
Marks: +1, -0
A thermodynamic system is taken from an original state to anintermediate state by the linear process shown in figure.
Its volume is then reduced to the original value from E to F by an isobaric process. Calculate the total work done by the gas from D to E to F.
Solution:  
Total work done by gas equals to area enclosed.
W = Area DEFD
=12×EF×DF= \frac{1}{2} \times E F \times D F
=12×(5−2)×(600−300)= \frac{1}{2} \times (5-2) \times (600-300)
=450 J=450\,\mathrm{J}
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