An internal combustion engine uses acetylene $(C_2{H}_2)$ as a fuel. The molecular weights of air and acetylene are $29$ and $26\frac{g}{m}ol,$ respectively. It is required to:

Write the balanced chemical equation for acetylene with stoichiometric oxygen. $(2$ marks$)$

Write the balanced chemical equation for acetylene with $20\%$ excess air. $(2$ marks$)$

Obtain the stoichiometric air$/$fuel ratio. $(2$ marks$)$

Obtain the actual air$/$fuel ratio. $(2$ marks$)$

Calculate the fuel$-$equivalence ratio. $(2$ marks$)$

Determine if the fuel mixture is rich or lean. $(1$ mark$)$

$7$

i

B

$I$

U

$x_2$