Methane (CH4) and air are fed into an adiabatic combustion chamber. The flow rate of methane is 1 mol/min and the flow rate of air is 15 mol/min. Methane and air are mixed and the gas mixture into the combustion chamber the temperature is 25 C. Assume that the composition of the air is 21 mol% oxygen (O2) and 79 mol% nitrogen (N2). a) The gas mixture is ignited, and the combustion reaction takes place. Assume completely combustion. Calculate the composition of the flue gas (product gas) on a dry basis. b) Calculate the temperature in the combustion chamber (the temperature of the product gas after combustion).