Practicing Success
Practicing Success
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The coefficient of performance of a refrigerator is 9. If the temperature inside freezer is –30°C, the temperature of the surroundings to which it rejects heat is : |
2.1°C 3°C -3°C 4°C |
-3°C |
\(k = \frac{1}{\frac{T_1}{T_2} - 1}\) k = 9 ; T2 = - 30°C = 243 K \(9 = \frac{1}{\frac{T_1}{243} - 1}\) T1 = 270 K = - 3oC |
