An air-standard dual cycle operates with a compression ratio of 18:1. At the beginning of compression the conditions are 298 K, 1 bar, and 4 L. The amount of heat added is 6.3 kJ, of which 30% is added at constant volume and the remainder at constant pressure. Determine the temperature after isentropic expansion the pressure after the constant-volume heat-addition process the temperature after the constant-pressure heat-addition process, in degrees Kelvin the thermal efficiency the temperature before the constant-pressure heat-addition process, in degrees Kelvin

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