Third law of thermodynamics

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The Third law of thermodynamics says:

The statement is: At absolute zero , the entropy of a perfectly crystalline substance is zero.

Experimentally, it is not possible to obtain -273.15°C. It is found that most of the gases either liquify or solidify before reaching such a temperature, gaseous molecules no longer remaining. So far, scientists have been able to get close to, but not exactly, absolute zero.

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