3. A flow of 100 SCFM of a gas containing 75 mole% methane and 25 mole% hydrogen is burned with 30 % excess air. All the fuel is consumed. The preheated air enters the combustor separately at 175 C and 790 mm Hg (absolute). The flue gas leaves the combustor at 900 K and 790 mm Hg (absolute). Analysis of the flue that the partial pressure of CO is 11 mm Hg. gas shows Determine (assuming ideal gas behaviour where needed): (a) the molar flow rate (mol/min) of the fuel feed, Answer: 126.3 mol/min (b) the molar flow rate (mol/min) of the air, Answer: 1270.8 mol/min (c) the actual volumetric flow rate (m3/min) of the air, Answer: 44.95 m3/min (d) the composition (mole%) of the flue gas, Answer: N2 = 72.2 mole % (I have not given the mole percentages of the other flue gas components because identifying the species present is part of the problem solution. You can check with me individually if you want.) (e) the actual volumetric flow rate (m/min) of the flue gas, and Answer: 98.81 m3/min (f) the flow rate of the flue gas in SCFM, Answer: 1101 SCFM