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Q15. Ideal gas in a cylinder is heated at constant volume from a temperature of 600°C to a temperature of 1000°C, and then further heated at constant pressure from 1000°C to 1300°C. The change in specific entropy in the first process is 0.283 kJ/kg K. After being heated, the gas expands isentropically to fifteen times its initial volume and a temperature of 306°C.

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

(b) Determine EACH of the following:

(i) The values of C_v, C_p and γ for the gas

(ii) The change in specific entropy during the constant pressure process

(iii) The work transfer per kg of gas during isentropic expansion.