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What is boiling point
The point at which vapor pressure is equal to atmospheric pressure
The energy needed for a liquid to gas phase change
Heat of vaporization which is endothermic
Factors affecting boiling point
Intermolecular forces, number of carbons, number of branching point, attractive and bonding forces.
Intermolecular forces effect on boiling point
Ionic > hydrogen bonding > dipole-dipole > van der walls/london disperson
Branching points ____ BP while number of carbons /greater surface area ______ BP
Decrease; increase
What is pressures affect on boiling point
Increases the BP because the vapor pressure need to equal the higher atmospheric pressure