Intermolecular ForcesHESI A2 cheat sheet

Attraction between molecules

7 key facts 1 practice questions Reviewed Oct 2026

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The Types

London dispersion — weakest, in all molecules
Dipole-dipole — between polar molecules
Hydrogen bonding — strongest, needs H bonded to N, O or F

Effects

Stronger forces raise boiling point and surface tension
Water's hydrogen bonding explains its unusually high boiling point

Vs Bonds

Intermolecular forces are between molecules and far weaker than the bonds within them

Solubility

Like dissolves like — matching polarity

Key takeaway

Attraction between molecules

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Question 1 of 1

An equation must be balanced because:

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