Air enters a pipe at 25°C, 100 kPa with avolumetric flow rate of 23 m³/hr. On the outer pipesurface is an electrical resistor covered with insulation. With avoltage of 120V, the resistor draws a current of 4 amps. 

Assuming the ideal gas model with c_p= 1.005 kJ/kg·K forair and ignoring kinetic and potential energy effects, determine(a) the mass flow rate of the air in kg/hr, and (b) the temperatureof the air at exit, in °C.