Two adiabatic chambers, 2 m3 each, are interconnected by a valve, as shown in Fig. P5-123,...

Two adiabatic chambers, 2 m3 each, are interconnected by a valve, as shown in Fig. P5-123, with one chamber containing oxygen at 1000 kPa and 127°C and the other chamber evacuated. The valve is now opened until the oxygen fills both chambers and both tanks have the same pressure. Determine the total internal energy change and the final pressure in the tanks.