A fuel gas containing 95.0 mole% methane and the balance ethane is burned completely with 35.0 % excess air. The stack gas leaves the furnace at 800.0 C and is cooled to 450.0 C in a waste-heat boiler, a heat exchanger in which heat lost by cooling gases is used to produce steam from liquid water for heating, power generation, or process applications. Physical Property Tables Combustion Gases Take as a basis 100.0 mol of the fuel gas fed to the furnace. Calculate the amounts of each of the following gases leaving the furnace at 800.0 C. 02 i mol N2 i mol CO2 i mol H2O i mol e Textbook and Media Save for Later Attempts: 0 of 3 used Submit Answer Cooling Required Taking as a basis of calculation 100.0 mol of the fuel gas fed to the furnace, calculate the amount (magnitude) of heat (MJ) that must be transferred from the gas in the waste heat boiler to accomplish the indicated cooling. i MJ Save for Later Attempts: 0 of 3 used Submit Answer Steam Produced How much saturated steam at 50.0 bar can be produced from boiler feedwater at 40.0 C for the same basis of calculation? i kg water (Assume all the heat transferred from the gas goes into the steam production). Save for Later Attempts: 0 of 3 used Submit Answer Scaling At what rate (kmol/s) must fuel gas be burned to produce 1280.0 kg/h of saturated steam (an amount required elsewhere in the plant) in the waste-heat boiler? What is the volumetric flow rate (m/s) of the stack gas leaving the boiler? n feed = x 10-3 kmol/s V Stack gas at 450.0C = i 3 m/s Save for Later Attempts: 0 of 3 used Submit