Question $2$

Ethane $(C_2{H}_6)$ is burned with $50\%$ excess air. The percentage conversion of ethane is $90\%.$ Of the ethane burned, $25\%$ reacts to form $CO$ and the balance reacts to form $C{O}_2.$

$2\mathrm{.}1$ Calculate the molar composition of the flue gas on a dry basis and the mol ratio of

$17$

water to dry flue gas

$2\mathrm{.}2$ How much energy should be added or is produced by the combustion process

$11$

assuming all the reactants and products enter and leave at $25C$

$28$