QUESTION 1 A CO2 refrigeration unit works between the temperature limits of 25°C and -17°C. Calculate the following: 1.1. Ideal coefficient of performance. (3) 1.2. The mass of ice unit it can produce in one hour if it uses water at 15°C. The relative COP is 0.655, LI for ice is 305 kJ/kg and the power supplied is 115 kW.