Problems 20-22 are based on the following statement: Saturated liquid ammonia at 10C is partially vaporized through a let-down valve to provide a refrigeration system at 10C. The ammonia flow rate through the valve is 5kg/s and it leaves the vaporizer as saturated vapor. You can use the following table for ammonia properties. 20. (4 pts) The amount of heat that can be removed by the refrigeration system at 10C is [A] 6,020kW [B] 6,125kW [C] 6,483kW [D] 6,515kW 21. (4 pts) The power required to compress the saturated ammonia vapor leaving the vaporize higher pressure is [A] 99kW [B] 396kW [C] 495kW [D] 1303kW