Relationship of Intermolecular Forces to Phase Changes

Example Based on intermolecular forces, predict which will have the higher vapor pressure and higher boiling point, water or dimethyl ether, CH3-O-CH3. 

Answer Dimethyl ether will have the higher vapor pressure and the lower boiling point. 

Explanation Water is a polar substance with strong intermolecular hydrogen bonds. Dimethyl ether is a polar material with weaker intermolecular forces (dipole-dipole). It will 

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