If a refrigerator's door is kept open. Will the room become hot or cool? Explain.
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Answered by
6
Initially, the room gets cooler due to the cold air from the refrigerator.
But as time passes the room will get warmer and warmer.
Just keep this in the mind.
Heat is an energy. Cold is the absence of energy (heat).
So if the oven produces heat, it doesn't mean that a refrigerator will give out cool air.The work of a refrigerator is to move heat from one place to another.
We keep food materials in a refrigerator to store it for a long time by making it cool.When we keep food material inside a refrigerator , it loses its heat that it may have acquired from the surrounding and gets colder, and where does the heat end up?
The room where you have placed your refrigerator!
We can think a refrigerator as motor.
Like a motor a refrigerator needs energy to run, so it draws electricity from a source.In order to produce a cooling effect inside it, it moves heat from one place to another,and if you open its door, it will move the energy out to the room.
And as the refrigerator draws more and more current , it also releases some of the electrical energy in the form of heat energy in the surrounding.
This combined heat results in warming up the room in which the refrigerator is kept!
But as time passes the room will get warmer and warmer.
Just keep this in the mind.
Heat is an energy. Cold is the absence of energy (heat).
So if the oven produces heat, it doesn't mean that a refrigerator will give out cool air.The work of a refrigerator is to move heat from one place to another.
We keep food materials in a refrigerator to store it for a long time by making it cool.When we keep food material inside a refrigerator , it loses its heat that it may have acquired from the surrounding and gets colder, and where does the heat end up?
The room where you have placed your refrigerator!
We can think a refrigerator as motor.
Like a motor a refrigerator needs energy to run, so it draws electricity from a source.In order to produce a cooling effect inside it, it moves heat from one place to another,and if you open its door, it will move the energy out to the room.
And as the refrigerator draws more and more current , it also releases some of the electrical energy in the form of heat energy in the surrounding.
This combined heat results in warming up the room in which the refrigerator is kept!
Answered by
1
Answer:
- As a refrigerator is a heat pump.
- Hence it extracts heat from a low temperature reservoir and transfers it to a high temperature reservoir.
- Thus, refrigerator exhausts more heat into the room than it extracts from it. Hence, the room will become warm.
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