Hydrocarbon molecures comprising at 9 carbon atoms and 20 hydrogen atoms is burned in 180% theoretical air. A flue gas condenser is used to extract the latent heat of condensation from the water vapor in the products of combustion. What temperature in degrees Celsius do the flue gases have to be cooled to for condensation of the water vapors to occur? Find a fuel air ratio? (Assume molar mass of air is 28.97 kg/kmol)