The student id is 3,8,9 for example. DO THE B Question ONLYY

2. A methane fuel stream is burned in a combustion chamber with excessive air. Given that 53% of methane undergoes complete combustion, 22% of methane undergoes partial combustion and the remaining is unburned. TABLE Q2 shows the flowrate of the methane fuel stream fed to the combustion chamber and the percentage excess of air fed to the combustion chamber. Student with matric ID ending with respective number (last digit number) TABLE Q2 Flowrate of the methane fuel stream fed to the combustion chamber, kg/s 638 1273 2011 Percentage excess of air fed to the combustion chamber 0, 2, 4, 5 1, 6, 7 3, 8, 9 72% 129% 163% a. By drawing a completely labelled flowchart for this process, determine the molar flowrates and molar composition (on dry basis) for all components in the stack gas. [36 marks] b. If the same percentage excess of oxygen is fed to the combustion chamber instead of air, predict the changes on the carbon dioxide's molar flowrate in the stack gas by comparing with the values in part (a). Justify your answer. [10 marks)