Question: (6 points) A 4.2 L spark-ignition engine operates on the ideal Otto cycle with a compression ratio of 8. At the beginning of the compression

(6 points) A 4.2 L spark-ignition engine operates on the ideal

(6 points) A 4.2 L spark-ignition engine operates on the ideal Otto cycle with a compression ratio of 8. At the beginning of the compression process the air is at 105 kPa and 21C. The maximum cycle temperature is 1118C. Accounting for variable specific heats, determine: the heat addition per cycle kJ the net work per cycle kJ the mean effective pressure (MEP) kPa the thermal efficiency % the thermal efficiency using the cold air standard assumption % If the engine operates at 2500 rpm, what is the power output of the engine? hp (6 points) A 4.2 L spark-ignition engine operates on the ideal Otto cycle with a compression ratio of 8. At the beginning of the compression process the air is at 105 kPa and 21C. The maximum cycle temperature is 1118C. Accounting for variable specific heats, determine: the heat addition per cycle kJ the net work per cycle kJ the mean effective pressure (MEP) kPa the thermal efficiency % the thermal efficiency using the cold air standard assumption % If the engine operates at 2500 rpm, what is the power output of the engine? hp

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