PPT Slide

SAMPLE PROBLEM 12.3

Predicting the Type and Relative Strength of Intermolecular Forces

PROBLEM:

For each pair of substances, identify the dominant intermolecular forces in each substance, and select the substance with the higher boiling point.

(a) MgCl2 or PCl3

(b) CH3NH2 or CH3F

(c) CH3OH or CH3CH2OH

• Bonding forces are stronger than nonbonding (intermolecular) forces.

• Hydrogen bonding is a strong dipole-dipole force.

• Dispersion forces are decisive when the difference is molar mass or molecular shape.

PLAN:

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