In a boiler furnace, a natural gas includes $85\%C{H}_4,$ balanced with $C_2{H}_6.$ is burned with $25\%$ excess dry air. The entering temperatures of natural gas and dry air are $25C$ and $120C,$ respectively. When the complete combustion occurs, calculate the adiabatic flame temperature.

$\backslash$table$[[,C_{p,\text{m}\text{e}\text{a}\text{n}}(\frac{J}{m}$olK$),,,$ as $($:$H_{2}O(l)\}$