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omework 3 Question 1 (of 8) value: 12.50 points 2 out of 3 attempts A cold air-standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes: 1-2 v constant, heat addition from 14.7 psia and 80°F in the amount of 260 Btu/lbm 2-3 P constant, heat addition to 3,200 R 3-4 Isentropic expansion to 14.7 psia 4-1 P-constant, heat rejection to initial state (a) Calculate the total heat input per unit mass. qin,total-597 . 9 BtuЛЬт Round your final answers to one decimal place. (b) Determine the thermal efficiency. η th-1 % Round your final answers to one decimal place. References eBook &Resources
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