A piston-cylinder device initially contains 0.5 m³ of nitrogen gas at 400 kPa and 27°C. An electric heater within the device is turned on and is allowed to pass a current of 2 A for 5 min from a 120-V source. Nitrogen expands at constant pressure, and a heat loss of 2800 J occurs during the process. Determine the final temperature of nitrogen. 2A 120 V P, kPa A N₂ P = const. V₁ = 0.5 m³ P₁ = 400 kPa T₁ = 27°C 400 0.5 2800 J V, m³