A spark$-$ignition engine working on an ideal Otto cycle has a compression ratio of $4.$ The

initial pressure and temperature of air are $1$ bar and $17C.$ The maximum pressure in the

cycle is $25$ bar. For unit mass flow, calculate:

The pressure $(p),$ volume $(V),$ and temperature $(T)$ at various salient points of the

cycle.

$(6$ marks$)$

$(2\mathrm{.}5$ marks$)$

$(2\mathrm{.}5$ marks$)$

$(1$ mark$)$

The ratio of heat supplied to the heat rejected.

Use: $=1\mathrm{.}4,C_v=0\mathrm{.}717k\frac{J}{k}g*K,M=29k\frac{g}{?}$ Kmole $,R=8\mathrm{.}314k\frac{J}{K}$mole$*K$

Fill the answers in the following table: