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3. If nothing can ever be at absolute zero, why does the concept exist?
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3. If nothing can ever be at absolute zero, why does the concept exist?

User Alexey Voinov
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21 votes
The reason has to do with the amount of work necessary to remove heat from a substance, which increases substantially the colder you try to go. To reach zero kelvins, you would require an infinite amount of work.
User Sean Kinsey
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