AIIMS2006Chemistry-Thermodynamics
AIIMS 2006 Chemistry Phase Equilibrium MCQ Question
Type: MCQ-conceptual-Medium-Class 11
For a phase change H₂O (l) ⇌ H₂O (s) at 0°C, 1 bar
A
ΔG = 0
B
ΔS = 0
C
ΔH = 0
D
ΔU = 0
Correct Answer
Option A
Detailed Explanation
ΔG° = -RTlnK. If a substance is in equilibrium between two phases at constant temperature and pressure, its chemical potential must have the same value in both the phases. ΔG° = 0.
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