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Q1. A mass of 2 kg of carbon dioxide at a pressure and temperature of 12 bar and 800°C respectively, expands in an isentropic process to a pressure of 2 bar. It is then cooled at constant pressure to a temperature of 15℃

(a) Sketch the processes on Pressure-Volume and Temperature-specific entropy diagrams. (3)

(b) Calculate the net-work transfer. (13)

Note : Atomic mass 44 kg/kmol, Universal gas constant R_o = 8.3145 kJ/kmol K. for Carbon dioxide γ = 1.33