A piston-cylinder device contains 0.5 m³ of nitrogen gas at 400 kPa and 27 °C. An electric heater is turned on for 5 minutes and passes 2 amps through the heating coil where there is a 120 volt voltage drop. The restraining force on the piston (weight of the piston plus atmospheric pressure) is such that the gas remains at constant pressure as it expands. There is also a loss of heat to the surroundings in the amount of 2800 J (2.8 kJ) during the process. What is the final temperature of the nitrogen, in °C? (Answer given as 50 but when calculated is off)