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← ScienceWhich outcome occurs when cooling a water-glycol mixture past its freezing point?
A)Hydrogen bond network expansion and separation✓
B)Increased covalent bond vibrational frequency
C)Glycol polymerization due to Van der Waals
D)Ionic bond creation leading to crystallization
💡 Explanation
Hydrogen bond network expansion causes increased volume and eventual phase transition when freezing. Because hydrogen bonds become more ordered, they increase molecular separation, therefore the mixture expands rather than contracting, because covalent bonds stay quite stable.
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