Air in a piston-cylinder assembly initially at 290 k and

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Air in a piston-cylinder assembly, initially at 290 K and 100 kPa, undergoes two internally reversible processes in series.

Process 1-2: Polytropic compression (n = 1.19) to pressure P2 = 500 kPa.

Process 2-3: Adiabatic expansion back to initial pressure of 100 kPa.

(a) Sketch the two processes in series on a T-s diagram.

(b) Determine the temperature at state 2 (K).

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