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Question
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 Cp = 1 kJ/kg)
Options:
A .  25 kJ/kg
B .  125 kJ/kg
C .  50 kJ/kg
D .  100 kJ/kg
Answer: Option C

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