A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with = 1 kJ/kg)

A refrigerating system operating on reversed Brayton refrigeration cyc

1.	A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with = 1 kJ/kg)
A.	25 kJ/kg
B.	50 kJ/kg
C.	l00 kJ/kg
D.	125 kJ/kg
Answer» C. l00 kJ/kg