Consider a furnace that has not been maintained so that some carbon monoxide is produced. All the fuel is completely converted to gaseous products, but the exhaust gas contains a CO$2$:CO ratio of $9$:$1.$ The fuel stream contains $180$ mol$/$s of methane at $25\backslash$deg C and this fuel is combusted with a stoichiometric amount of air. How much heat is removed if the exhaust leaves the furnace at $900$ deg C$?$