At steady state, fuel oil is supplied at 0.01 gal/min to an oil furnace for home heating. (1 gal = 3.785 10–3m³.) The fuel oil density is 870 kg/m³. Combustion air at 65 F and 1 atm enters the furnace with a volumetric flow rate of 15.2 ft³/min.

(i) Determine the mass flow rate of combustion product gases flowing up the chimney flue.

(ii) Also determine the average velocity of the flue gas if the gas temperature is 225 F and the flue diameter is 9 inches. Assume that the flue gases behave as an ideal gas with an apparent molecular weight of 29 kg/kmol.  assume that the pressure in the flue is essentially 1 atm (absolute).