Air flows through an Otto cycle, beginning the compression process at a temperature of 120°F and a pressure of 13.2 psia. The volume of gas present in the cylinder at the start of compression is 0.072 ft3. The compression ratio of the cycle is 9.5. The engine completes 1400 cycles per minute. Plot the power produced by the engine, the maximum temperature of the cycle, the thermal efficiency of the cycle, and the mean effective pressure for levels of heat addition varying between 250 and 850 Btu/lbm of air, assuming that the air behaves as an ideal gas with variable specific heats.
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