A certain LPG has a composition of $70\%$ propane $($CHs$)$ and $30\%$ butane$($C$4$H$10).$ Compute the theoretical exhaust

gas composition and heat release per kg of fuel, when burnt with a dilution coefficient of $($i$)0\mathrm{.}9$ and $($ii$)0\mathrm{.}6.$ Take

the Higher Heating Values of propane, butane and CO to be $50\mathrm{.}4$ MJ$/$kg$,49\mathrm{.}6$ MJ$/$kg and $10\mathrm{.}1$ MJ$/$kg respectively.

$($Ans: $($i$)$ HHV$=43717$ kJ$/$kg; $($ii$)28338$ MJ$/$kg $)$