10. [-/4 Points] SERPSE10 21.A.0P.040. ASK YOUR TEACHER PRACTICE ANOTHER A "cold room used for low-temperature research is maintained at a constant temperature of 7.00C. The refrigeration unit vents to outdoor air which is at 27.0C. The rate at which energy is exhausted to the outdoors is 17.0 kW. The coefficient of performance (COP) of the refrigeration unit is equal to 38.0% of the COP of an ideal Carnot refrigerator. (a) At what rate (in kW) does the refrigeration unit remove energy from the room? (Round your answer to at least two decimal places.) YW (b) What is the power input (in kW) required by the refrigeration unit? ! Tkw (c) What is the entropy change of the Universe (in J/K) produced by the refrigeration unit after it operates for 2.00 h? [ /K (d) If the outside temperature increases to 33.0C, what is the percent change in the COP of the refrigeration unit? (Include the sign of the value in your answer.) % Need Help? [[TResan ) Submit Answer 11. [-/4 Points] DETAILS MY NOTES SERPSE10 21.A.OP.041. ASK YOUR TEACHER A sample of n moles of a monatomic ideal gas undergoes the cycle show in the figure below. At point A, the gas has a pressure Py a volume V, and a temperature T @ 1,1 (a) If |Q,| is the total energy that enters the system by heat in one cycle, find the ratio "_, PV 19,1 _ | ry) - J (b) If |Q_| is the total energy that leaves the system by heat in one cycle, find the ratio (Ifl';l). i' 2.l (PV) 2 [ (c) What is the efficiency of an engine operating in this cycle? . ) (d) Imagine an engine that operates in a Carnot cycle between the same temperature extremes as found in this cycle. Calculate the ratio of the Carnot efficiency to the actual efficiency of this engine. Ccamot _ Cactual Need Help? Read It Submit