Argon steadily flows into a constant-pressure heater at 300 K and 100 kPa with a mass flow rate of 6.24 kg/s. Heat transfer in the rate of 150 kW is supplied to the argon as it flows through the heater.

(a) Determine the argon temperature at the heater exit, in °C.

(b) Determine the argon volume flow rate at the heater exit, in m³/s.