$6\mathrm{.}4\%$ CO$2,0\mathrm{.}2\%$O$2,0,40\%$ CO at $500$ C$.50\mathrm{.}8\%$ H$2.$ and $200$ gmol of synthesis gas, the remainder being Na$,$ is burned with $40\%$ excess dry air at $25$ C$.$ It is known that combustion gases exit the chimney at a temperature of $720$ C$.$ Determine the mole amounts of the exiting flue gases and the heat transfer from or to the combustion process.