London dispersion forces introduction | Chemistry | Khan Academy

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London dispersion forces result from the electrostatic attraction between temporary dipoles. Dispersion forces are present between all molecules (and atoms) and are typically greater for heavier, more polarizable molecules and molecules with larger surface areas.

Sections:
00:00 - Introduction to London dispersion forces
00:41 - Electron movement and temporary dipoles
01:32 - Induced dipoles and attraction
02:50 - Definition of London dispersion forces
03:52 - Polarizability and electron clouds
05:02 - Comparing helium and argon dispersion forces
05:40 - Boiling point comparison: helium vs argon
06:40 - Summary: molecular size and dispersion force strength

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