In the figure given two processes A and B are shown by which a thermo-dynamical system goes from initial to final state F. If ΔQA and ΔQB are respectively the heats supplied to the system then

The area under the graph 'iAf' is greater than area under the graph 'iBf'So work done by teh gas in process A is greater than the work done by the gas is process A is greater than that in process B.Also ΔU = (Uf - Ui) is same for both process as internal energy is a state function.