Five kilograms of a gas with molecular weight of 32 kg/kmol and a temperature of 110°C is contained in a closed, rigid tank fitted with an electric resistor whose mass is negligible. The resistor draws a constant current of 12 amps at a voltage of 125 V for 5 minutes. Measurements indicate that when equilibrium is reached, the temperature of the gas has increased by 44.1°C. Heat transfer from the gas is estimated to occur at a constant rate of 1 kW. Assuming ideal gas behavior and negligible kinetic and potential energy effects, determine an average value of the specific heat, c_p, in kJ/kg·K, of the gas in this temperature interval based on the measured data.