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A four-cylinder spark-ignition engine has a compression ratio of 10.5, and each cylinder has a maximum volume of 0.4 L. At the beginning of the compression process, the air is at 98 kPa and 378C, and the maximum temperature in the cycle is 2100 K. Assuming the engine to operate on the ideal Otto cycle, determine

(a) the amount of heat supplied per cylinder

(b) the thermal efficiency

(c) the number of revolutions per minute required for a net power output of 45 kW. Assume variable specific heats for air.

(a) the amount of heat supplied per cylinder

(b) the thermal efficiency

(c) the number of revolutions per minute required for a net power output of 45 kW. Assume variable specific heats for air.

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