Answer:
The coefficient of performance of the refrigerator is 2.251.
Explanation:
In this case, the coefficient of performance of the refrigerator (
), no unit, is equal to the ratio of the heat rate received from the water to the power needed to work, that is:
(1)
(2)
Where:
- Heat rate received from the water, in watts.
- Power, in watts.
- Density of water, in kilograms per cubic meter.
- Volume of water, in cubic meters.
- Specific heat of water, in joules per kilogram-degree Celsius.
- Temperature change, in degrees Celsius.
- Cooling time, in seconds.
If we know that 
, 
, 
, 
, 
and 
, then the coefficient of refrigeration of the refrigerator is:
The coefficient of performance of the refrigerator is 2.251.
