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Q. 69

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 598

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Short Answer

of water at is placed in the freezer compartment of a refrigerator with a coefficient of performance of . How much heat energy is exhausted into the room as the water is changed to ice at ?

As a result, the heat emitted into the room is.

See the step by step solution

Step by Step Solution

Step 1:The heat energy of the certain mass

The heat energy of a specific mass with a specific heat capacity that is subjected to a temperature difference is given as:

Where m is the body's mass and C is its specific heat capacity and is the temperature difference.

Step 2: The heat energy removed from the water

The mass of the water sample is :

The heat energy extracted from water is known as:

The performance metric is:

As a result, the work input is

The heat that is emitted into the room is:

As a result, the amount of heat emitted into the room is reduced .

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