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Q1. The initial pressure, volume and temperature of air in a cylinder are 1.0 bar, 0.2 m³ and 25℃ respectively. It is heated at constant volume to a temperature of 600℃ and then reversibly expanded to the original pressure according to the law pV^1.35 = constant.

(a) Calculate EACH of the following:

(i) the work done; (4)

(ii) the change in internal energy in the expansion process; (4)

(iii) the heat transferred in the expansion process; (2)

(iv) the overall change in entropy. (2)

(b) Sketch the processes on Pressure-Volume and Temperature-specific entropy diagrams. (4)

Note: for air C_v = 0.718 kJ/kg K and R = 0.287 kJ/kg K