Chemistry Class-11: Chapter – 6. Thermodynamics Part – 12 (For CBSE, ICSE, IAS, NET, NRA 2023)

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Question: 62

Graphically show the total work done in an expansion when the state of an ideal gas is changed reversibly and isothermally . With the help of a plot compare the work done in the above case with that carried out against a constant external pressure .


(i) Reversible Work is represented by the combined areas

Constant External Pressure


Reversible Work

(ii) Work against constant pressure, is represented by the area

Constant Pressure

Isothermal Change