HW #6, P2 - Rev., Irrev. and Impossible Refrigeration Cycles - 8 pts

A refrigeration cycle operating between two reservoirs receives QC from a cold reservoir at TC = 250 K and rejects QH to a hot reservoir at TH = 300 K. For each of the following cases, determine whether the cycle is reversible, irreversible or impossible.

a.) QC = 1000 kJ and Wcycle = 400 kJ
b.) QC = 1500 kJ and QH = 1800 kJ
c.) QH = 1500 kJ and Wcycle = 200 kJ
d.) COP = 4