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At absolute zero a perfect crystal has only one microstate because there is:
AInfinite kinetic energy
BConstant heat exchange
COne location per particle
DNo matter present
Answer & Solution
Correct answer: C. One location per particle
1. Perfect order removes every alternative arrangement.
2. The solid is pure, perfectly crystalline and completely lacking motion.
3. That means there is but one possible location for each identical atom or molecule.
4. So W equals 1 for the crystal.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 16 'Thermodynamics', sections 16.1-16.4_
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