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The working substance for a Carnot cycle is 8 lb of air. The volume at the beginning of isothermal expansion is 9 cu ft and the pressure is 300 psia. The ratio of expansion during the addition of heat is 2 and the temperature of the cold body is 90°F. Find (a) QA, (b) QR, (c) V3, (d) p3, (e) V₁, (f) p₁, (g) pm, (h) the ratio of expansion during the isentropic process, and (i) the overall ratio of compression.

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