July 28, 2010

The third law of thermodynamics

The third law of thermodynamics states that
As a system approaches absolute zero, all processes cease and the entropy of the system approaches a minimum value.

Absolute Zero = 0 Kelvins = -273.15° Celsius

The Universe will attain absolute zero when all energy and matter is randomly distributed across space.
This version states not only ΔS will reach zero at 0 kelvins, but S itself will also reach zero, at least for perfect crystalline substances.

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