Practice question · True or false
The entropy of a perfect crystal approaches zero as the temperature approaches absolute zero.
Hints
- How many arrangements does a perfect crystal have at zero temperature?
- Exactly one, and the logarithm of one is zero.
Show the answer
True
Why
True, this is Planck’s statement of the third law. With exactly one accessible arrangement, , which gives entropy a genuine absolute zero that energy does not have.
Practise The Third Law and Low Temperatures
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