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College Physics (Urone)
Found in: Page 549

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Short Answer

Can you cool a kitchen by leaving the refrigerator door open?

No, it is not possible to make a kitchen cool by leaving the door of a refrigerator open.

See the step by step solution

Step by Step Solution

Step 1: Describe how the refrigerator works.

A refrigerator operates in a reverse mode to that of a heat pump. It takes heat from the cooler body and transfers it to the hot body. The work input is required to transfer heat from cold to hot body.

Step 2: Explain what happens to the kitchen temperature when the refrigerator door is open

The refrigerator transfers heat from a cold body to a hot body, using the work done on it. The atmosphere around the fridge acts as an infinite source of energy. So if we leave the door of the refrigerator open, it will take heat from the surrounding, external work being done on it, and then releases a large amount of heat into the surrounding. It will make the surroundings warm.

Therefore, you cannot make the kitchen cool by leaving the refrigerator door open.

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