A Carnot cycle refrigerator operates between 250 K and 300 K. Its
| A Carnot cycle refrigerator operates between 250 K and 300 K. Its coefficient of performance is
A. 6
B. 5
C. 1.2
D. 0.8
Please scroll down to see the correct answer and solution guide.
Right Answer is: B
SOLUTION
\(COP = \frac{{Refrigerating\;Effect}}{{Work\;Input}} = \frac{{{Q_2}}}{{{W_{net}}}} = \frac{{{Q_2}}}{{{Q_1} - {Q_2}}}\)
For Carnot cycle refrigeration:
\(COP = \frac{{{T_2}}}{{{T_1} - {T_2}}} = \frac{{250}}{{300 - 250}} = 5\)
