Assignment $1.$

For the stoichiometric mixture of Exercise $3($See Exercise $3$ at the end of this assignment$)$

Calculate

a$)$the volume of the mixture per kilogram of fuel at a temperature of $65$C and a pressure of $1\mathrm{.}013$bar.

b$)$the volume of the product of combustion per kilogram of fuel after cooling to a temperature of $120$C and a pressure of $1$bar.

Assignment $2.$

a$)$ if the products in Assignment $1($see end of this assignment$)$ are cooled to $15$C at constant pressure, calculate the amount of water which will condense per kilogram of fuel

Assignment $3$

a$)$The gravimetric analysis of a sample of coal is given $4$as $80\%$ C$,12\%$ H$,$ and $8\%$ ash. Calculate the stoichiometric A$/$F ratio and the analysis of the products by volume

Assignment $4$

a$)$A gas engine is supplied with natural gas of the following composition: CH$493\%$; C$2$H$63\%$; N$23\%$; CO $1\%.$ If the A$/$F ratio is $30$ by volume; calculate the analysis of the dry product of combustion. It can be assumed that the stoichiometric A$/$F ratio is less than $30.$

Exercise $3.$

Ethyl alcohol is burned in a petrol engine

Calculate:

a$)$The stoichiometric Air$/$Fuel ratio

b$)$The Actual Air$/$Fuel ratio, the dry and wet analysis by volume of the exhaust gas for a mixture strength of $90\%$

c$)$The Actual Air$/$Fuel ratio, the dry and wet analysis by volume of the exhaust gas for a mixture strength of $120\%$

Mixture strength, $M_s=\frac{O}{?}=\frac{\text{s}\text{t}\text{o}\text{i}\text{c}\text{h}\text{i}\text{o}\text{m}\text{e}\text{t}\text{r}\text{i}\text{c}\frac{\text{A}\text{i}\text{r}}{\text{F}\text{u}\text{e}\text{l}}\text{r}\text{a}\text{t}\text{i}\text{o}}{\text{a}\text{c}\text{t}\text{u}\text{a}\text{l}\frac{\text{A}\text{i}\text{r}}{\text{F}\text{u}\text{e}\text{l}}\text{r}\text{a}\text{t}\text{i}\text{o}}$