Thermal Efficiency of Otto Cycle - GATE ME '98

The minimum pressure and temperature in an otto cycle are 100 kPa and 27 C. The amount of heat added to the air per cycle is 1500 kJ/kg. Determine the pressure and temperature at all points of the air standard otto cycle. Also, calculate the specific work and the thermal efficiency of the cycle for compression of 8:1. (Take Cv(air) as 0.72 kJ/kg and ϒ =1.4)