Q$2)$ Fuel $($heating value $=10\mathrm{.}7M\frac{J}{?},$ the volumetric Air to fuel ratio, $A{F}_{\text{s}\text{t}\text{o}\text{v}\text{i}\text{c}\text{h}}=18\mathrm{.}4m^3$ air $\frac{?}{m^3}\_$fuel$)$ is to be burnt in a boiler $"85\%$ efficient" to deliver $35kW$ of thermal energy, what is the actual amount of combustion fir peeded $($L$/$nour$)$ when the fuel is burat with $13\%$ excess air.

Q$3)$ The volumetric dry gas analysis of burning gaseous $n-0$ ctane $Ca{H}_{18}$ at $25C$ and $1$ atm is as follows:

$C{O}_2=5\mathrm{.}9\%,CO=1\mathrm{.}60\%,O_2=10\mathrm{.}808\%$

$a{C}_8{H}_{18}+h(O_2+3\mathrm{.}76N_2)=>xC{O}_2+$yCO$+z{O}_2+e{N}_2+d{H}_{2}O$

Q$3-$A$)$ What is the kmoles number of $H_{2}O$ in products of this combustion" $"d"$

Q$3-$B$)$ What is the air to fuel ratio?

Q$3-$C$)$ What is the percentage of theoretical air used per unit kmol of ficel? "mass of alf grtoul," which are@ $330C$ and the ambient is $25C$

$\backslash$table$[[$Gas$,\backslash$table$[[$Mass fraction of$],[$the flue gaves$]],\backslash$table$[[Cp$