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Question 31060
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Kinetic Theory and Thermodynamics: Third Law MCQ

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Third LawHardQuestion 31060

Question

Third law of thermodynamics states that at absolute zero:
  1. A
    All reactions stop
  2. B
    Entropy of a perfect crystal = 0
    Correct
  3. C
    All motion ceases
  4. D
    Pressure becomes infinite

Correct answer

Entropy of a perfect crystal = 0

Explanation

Nernst-Planck statement (third law): as T → 0 K, entropy of a perfect crystal approaches zero — only one microstate available.

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