Calculate the theoretical temperature of combustion of ethane with \(25 \%\) excess air. The average specific heats in \(\mathrm{kJ} / \mathrm{kg}-\mathrm{K}\) may be taken as follows: \(\mathrm{CO}_{2}=1.24, \mathrm{O}_{2}=1.10\), Steam \(=2.41, \mathrm{~N}_{2}=1.19\). The combustion reaction for ethane is

\[ 2 \mathrm{C}_{2} \mathrm{H}_{6}(\mathrm{~g})+7 \mathrm{O}_{2}(\mathrm{~g})=4 \mathrm{CO}_{2}(\mathrm{~g})+6 \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \quad \Delta H_{273}=-1560 \mathrm{MJ} / \mathrm{kmol} \]