Figure below shows two paths that may be taken by a gas to go from a state A to a state C. In process AB, 400 J of heat is added to the system and in process BC, 100 J of heat is added to the system. The heat absorbed by the system in the process AC will be :

500 J 460 J 300 J 380 J

460 J

\(\Delta U_{cyc} = 0\) Qcyc = Wcyc QAB + QBC + QCA = closed loop area 400 + 100 + QCA = 1/2 x 2 x 10-3 x 4 x 104 QCA = 460 J