Q62Long answer
Graphically show the total work done in an expansion when the state of an ideal gas is changed reversibly and isothermally from (pi , Vi ) to (pf , Vf ). With the help of a pV plot compare the work done in the above case with that carried out against a constant external pressure pf . 77 Thermodynamics
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Fig. : 6.9 (i) Reversible Work is represented by the combined areas and . (ii) Work against constant pressure, pf is represented by the area Work (i) > Work (ii) 85 Thermodynamics