Gaseous CO2 is contained in a vertical piston-cylinder assembly by a piston of mass 50 kg and having an area of 0.01 m^2 . The mass of the CO2 is 4 g. The CO2 initially occupies a volume of 0.005 m^3 and has a specific internal energy of 657 kJ/kg. The atmospheric pressure is 100 kPa. A heat transfer of the amount 1.95 kJ occurs slowly from the CO2 to the surroundings. During the process, the volume of the CO2 decreases to 0.0025 m^3 . You may neglect friction effects. As this is happening on earth, g = 9.8 m/s^2 . For the CO2 as the system, determine:

a) the pressure of the CO2 at the final state

b) the final specific internal energy of the CO2, in kJ/kg.

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Draw the configuration of the forces acting on the piston pPant m... View the full answer