An ordinary vapor compression refrigerator is to operate on refrigerant R134a with evaporator and condenser temperatures at -20°C and 35°C. Assume the compressor is reversible.

(a) Make a table summarizing the nature (e.g., saturated, superheated, temperature, pressure, and H) of each point in the process.

(b) Compute the coefficient of performance for this cycle and compare it to the Carnot cycle value.

(c) If the compressor in the cycle were driven by a 1 hp motor, what would be the tonnage rating of the refrigerator? Neglect losses in the motor.