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Per NCERT §5.6(e), the THIRD LAW of thermodynamics states which?
AThe entropy of any PURE CRYSTALLINE substance approaches ZERO as temperature approaches 0 K (absolute zero)
BEntropy is conserved
CEntropy of a gas = 0
DEntropy = enthalpy at high T
Answer & Solution
Correct answer: A. The entropy of any PURE CRYSTALLINE substance approaches ZERO as temperature approaches 0 K (absolute zero)
Per NCERT §5.6(e), third law: S = 0 at T = 0 K for a perfect crystal (perfect order). Permits absolute entropy calculations.
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