A gas is heated in a duct as it flows over a resistance heater. Consider a 101 kW electric heating system. The gas enters the heating section of the duct at 100 kPa and 27 °C with a volume flow rate of 15 m3/s. If heat is lost from the gas in the duct to the surroundings at a rate of 51 kW, the exit temperature of the gas is(Assume constant pressure, ideal gas, negligible change in kinetic and potential energies and constant specific heat; Cp = 1 kJ/kg·K; R = 0.5 kJ/kg·K.)

• A. 32°C
• B. 37°C
• C. 53°C
• D. 76°C