It includes wet vapor of R717 with a quality of 0.2 at a temperature of 15oC in a frictionless and well insulated piston-cylinder system shown in Fig. 2. Refrigerant is mixed with a propeller and initially occupies a volume of 5 L. When the pressure inside the cylinder reaches 800 kPa, the pin holding the cylinder will be broken and the propeller will stop, simultaneously. The piston moves upward after breaking the pin up to the point where equilibrium condition is obtained. Refrigerant is at saturated condition and a temperature of -15oC when the system reaches thermodynamic equilibrium. Calculate (a) the work done by the propeller, (b) The work done by the refrigerant after the pin is broken, and (c) the final volume of the refrigerant, (d) the entropy change of the refrigerant, (e) the entropy generation through this process.

R717 (25%) Q2. It includes wet vapor of R717 with a quality of 0.2 at a temperature of 15C in a frictionless and well insulated piston-cylinder system shown in Fig. 2. Refrigerant is mixed with a propeller and initially occupies a volume of 5 L. When the pressure inside the cylinder reaches 800 kPa, the pin holding the cylinder will be broken and the propeller will stop, simultaneously. The piston moves upward after breaking the pin up to the point where equilibrium condition is obtained. Refrigerant is at saturated condition and a temperature of -15C when the system reaches thermodynamic equilibrium. Calculate (a) the work done by the propeller, (b) The work done by the Fig: Q2 Piston- refrigerant after the pin is broken, and (c) the final volume of cylinder system the refrigerant, (d) the entropy change of the refrigerant, (e) the entropy generation through this process