Intermolecular Forces (unfinished)

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4 Terms

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Intermolecular forces

Covalent bonds are not affected when a molecular substance boils

Intermolecular forces of attraction between molecules are weaker than covalent bonds and are easily overcome

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Van der Waals forces

Random electron movement means electron density is not evenly distributed forming a dipole on one side

This induces a dipole in another molecule

The delta+ and delta- attract


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Permanent dipole-dipole interactions

If two molecules are polar the delta+ region of one is attracted to the delta- region of the other

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Hydrogen bonding

Hydrogen bonds only form with fluoride, oxygen or nitrogen

Lone pair on electronegative atom forms bonds hydrogen atom of another molecule

→ Strongest intermolecular force