A thermodynamic system is taken from an original state D to an intermediate sate E by the linear pressure shown in the figure. Its volume is then reduced to the original volume from E to F by an isobaric process. The total work done by the gas from D to E to F will be

<p>W_total = W_{D<strong>→</strong>E} + W_{E<strong>→</strong>F} = Area of triangle DEF</p><p>=&nbsp;<math><mrow><mfrac><mrow><mn>1</mn></mrow><mrow><mn>2</mn></mrow></mfrac><mo>×</mo><mn>3</mn><mo>×</mo><mn>3</mn><mn>0</mn><mn>0</mn><mo>=</mo><mn>4</mn><mn>5</mn><mn>0</mn><mi>J</mi><mo>.</mo></mrow></math></p>

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