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Q16. Air at a pressure of 1 bar and a temperature of 300 K is compressed polytropically in an engine cylinder from a volume of 0.4 m³ to a volume of 0.03 m³. The pressure after compression is 48.7 bar. Heat is then supplied at constant pressure until the temperature is 1800 K.

(a) Sketch the processes on p-V and T-S diagrams.

(b) Calculate EACH of the following:

(i) The index of compression

(ii) The temperature after compression

(iii) The total heat transfer

(iv) The total change in entropy.

Note: For air, γ = 1.4 and R = 0.287kJ/kg K.