An air-standard cycle with constant specific heats at room temperature is executed in a closed system with 0.0025 kg of air and consists of the following three processes:

1–2 v = Constant heat addition from 95 kPa and 17°C to 380 kPa
2–3 Isentropic expansion to 95 kPa
3–1 P = Constant heat rejection to initial state
The properties of air at room temperature are cp = 1.005 kJ/kg·K, cv = 0.718 kJ/kg·K, and k = 1.4.

(a) Show the cycle on P-v and T-s diagrams.
(b) Calculate the net work per cycle, in kJ.
(c) Determine the thermal efficiency.

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