Problem $1$:

An air$-$standard Otto cycle has a compression ratio of $7\mathrm{.}5.$ At the

beginning of compression, $p_1=85$kPa and $T_1=32C.$ The

mass of air is $2$ g $,$ and the maximum temperature in the cycle is

$960$ K $.$ Determine $($a$)$ the heat rejection, in kJ$.($b$)$ the net work, in

kJ $.($c$)$ the thermal efficiency. $($d$)$ the mean effective pressure, in

kPa $.$

Heat rejection: $0\mathrm{.}114$ kJNet work: $0\mathrm{.}167$ kJ $,$ Thermal efficiency: $59\mathrm{.}5\%$MEP:

$91\mathrm{.}45$ kPa