Intermolecular Forces

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  • Created by: Sophie
  • Created on: 22-12-10 14:26

Key Points

  • They are very weak.
  • London Firces are found between all atoms and molecules
  • Stronger London Forces mean higher boiling and melting points
  • Boiling points of alkanes depends on shapes and sizes
  • Long chain alkanes have higher boiling points than short-chain alkanes
  • Straight chain alkanes have higher boiling points than branched alkanes
  • Polar molecules have permenant dipole-dipole forces
  • Hydrogen is the stongest Intermolecular force


  • Electrons in charge clouds are always moving really quickly. Electrons are more likely to be more one sideed - causing a temporary dipole. This dipole causes another temporary dipole to form on the opposite side. Dipoles are attracted to one another. This continues like a domino effect…


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