1- A Carnot refrigeration cycle is executed in a closed system in the saturated liquid-vapor mixture region using 0.8kg of rrefrigrant-134a as the working fluid. The maximum and the minimum temperatures in the cycle are 20 and -8°C, respectively. It is known that the refrigerant is saturated liquid at the end of the heat rejection process, and the net work input the cycle is 15kJ.

Determine the fraction of the mass of the refrigerant that vaporizes during the heat addition process, and the pressure at the end of the heat rejection process.

b. check your rearview mirror

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