Thermodynamics II: Laboratory Assignment $-$ Combustion $[30$ marks$]$

$1..$Propane $(C_3{H}_8)$ is one of a group of liquefied petroleum gases $($LPG$)$ widely used in residential and

commercial applications. Determine the stoichiometric mass of air required to completely burn $1$ kg of

Propane. What is the Air: Fuel ratio?

A steam boiler at SEZELA Sugar uses pulverized coal in the furnace. The analysis of the coal by mass is as

follows: Carbon: $76\%$; Hydrogen: $11\%$; Oxygen: $7\%$; Sulphur $3\%$; Nitrogen $2\%$ and the remainder

incombustible ash. The air supplied is $33\%$ in excess of the theoretical minimum required for complete

combustion.

$2\mathrm{.}1.$ Determine the stoichiometric mass of air required for the complete combustion of $1$ kg of this fuel.

$2\mathrm{.}2.$ What is the Air$/$Fuel ratio?

$2\mathrm{.}3.$ Determine the percentage analysis of the products of combustion by mass and by volume.

Use the following relative molecular masses: $C=12,H_2=2,O_2=32,N_2=28$ and assume that air contains $23\%O_2$

and $77\%N_2$ by mass.

This assignment must be done with the same groups as for the boiler practical. Due date is Thursday, $10$TOBER $2024.$ N$.$B$.$ This

contributes $12,5\%$ of your DP mark.