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← ScienceWhich mechanism determines the boiling point differences between various molecular liquids at standard temperature and pressure?
A)Intermolecular Van der Waals forces✓
B)Intramolecular bond dissociation energy
C)Kinetic energy of constituent atoms
D)Total number of atoms in molecule
💡 Explanation
When molecular liquids are heated, overcoming intermolecular forces allows phase change because these forces dictate attraction strength among molecules. Therefore, Van der Waals forces determine boiling point, rather than bond energy, kinetic energy, or total number of atoms which do not affect macroscopic boiling behavior.
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