In an ideal Otto cycle, the volumes at the beginning and end of the compression process are 900 cm and 75 cm, respectively. The air temperature and pressure at the start of the compression process are 20 C and 100 kPa, respectively. The temperature of the air at the end of isentropic expansion is 785 K. Using constant specific heats at room temperature (Air properties at room temperature: cp-1.005 kJ/kgK, -0.718 kJ/kgK, R-0.287 kJ/kgK, k-1.4) (a) Calculate the pressure and temperature at each point of the cycle.

(b) Draw my P-v and T-s diagrams of the cycle, (c) Heat and net work (kJ) entering and leaving the cycle.

(d) the thermal efficiency of the cycle,

(e) Find the average effective pressure,