A series of thermodynamic processes is shown in the PV diagram. In process ab, 150 J of heat is added to the system, and in process bc, 600 J of heat is added. Find the internal energy change in the process abc. 8 x 10 Pa 3 x 10 Pa 0 b a 2x10 m' Ly 5x10 m A series of thermodynamic processes is shown in the PV diagram. In process ab, 150 J of heat is added to the system, and in process bc, 600 J of heat is added. Find the internal energy change in the process abc. 8 x 10 Pa 3 x 10 Pa 0 b a 2 x 10 m' Ly 5x10 m