One mole of an ideal monoatomic gas is subjected to changes as shown in the graph. The magnitude of the work done (by the system or on the system) is _______ J (nearest integer) Given : log 2 = 0.3, ln 10 = 2.3

Step-by-step solution

1 to 2 , Isobaric process 2 to 3, Isochoric process 3 to 1, Isothermal process Using work under isobaric, isochoric and isothermal processes respectively: W   =   W 1 → 2   +   W 2 → 3   +   W 3 → 1 W   =   ( ( - P ( V 2   -   V 1 )   +   0   +   ( - P 1 V 1 ( ln V 2 V 1 ) ) = ( ( - 1 ( 40   -   20 )   +   0   +   ( - 1   ×   20   ( ln 20 40 ) ) = 620   J