In a mechanical refrigerator, the low temperature coils are at a temperature of `-23^(@)` C and the compressed gas in the condenser has a temperature of ` 27^(@)C`. The theoretical coefficient of performance is :-

Options

A. 5
B. 8
C. 6
D. 6.5

Answer

A

Explanation

coefficient of performance `K=(T_(2))/(T_(1)-T_(2))`
` =((273-23))/((273+27)-(273-23))=(250)/(300-250)=(250)/(20)=5`