0.5 m3 of nitrogen at 400 kPa and 300 K is contained in a vessel insulated from the atmosphere. A heater within the device is turned on and allowed to pass a current of 2A for 5 min from a 120-V source. The electrical work is done on the system to heat the nitrogen gas. Find the final temperature of the gas in the tank. Cp for nitrogen is 1.039 kJ/kg K.