Only problem $9-43.9-42$ Someone has suggested that the air$-$standard Otto cycle is more accurate if the two isentropic processes are replaced with polytropic processes with a polytropic exponent n$=1\mathrm{.}3.$ Consider such a cycle when the compression ratio is $8,$ P$\_1=95$ kPa, T$\_1=15^$C$,$ and the maximum cycle temperature is $1200^$C$.$ Determine the heat transferred to and rejected from this cycle, as well as the cycle's thermal efficiency. Use constant specific heats at room temperature. Answers: $835$kJ $/$ kg$,420$kJ $/$ kg$,49\mathrm{.}8$ percent $9-43$ Repeat Prob. $9-42$ when isentropic processes are used in place of the polytropic processes?