The pressure-volume work for an ideal gas can be calculated by using the expression given as, w=∫ViVfpex dV. The work can also be calculated from the pV - plot by using the area under the curve within the specified limits. When an ideal gas is expanded (a) reversibly or (b) irreversibly from volume Vi to Vf, choose the correct option regarding the magnitude of work done.

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w( reversible )=w( irreversible )

w( reversible )

w( reversible )>w (irreversible)

w( reversible )>w (irreversible) +pex .ΔV

answer is C.

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Detailed Solution

W=−PextΔVFor expansion to occur Pext>Pext so work done is not as much as in reversible process

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