Question Bank MCQ • 1 Mark Section 5: Thermodynamics & Statistical Physics Thermodynamics & Statistical Physics - Module 4

QB_PH_150: Thermodynamics & Statistical Physics - Module 4

Question Statement

According to Nernst's heat theorem (Third Law), as $T \to 0\text{ K}$, the entropy of a perfect crystal approaches:
(A) 0
(B) k_B \ln(2)
(C) -\infty
(D) 1
Correct Answer
A
Verified Key

Step-by-Step KaTeX Derivation & Detailed Explanation

### Solution: The Third Law states $S \to 0$ as $T \to 0$ for a unique non-degenerate ground state.
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