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Unformatted text preview: Then larger dipole Then more attraction Heavier molecules greater dispersion forces C. Hydrogen Bonding 1. B.p. of H cpds (fig 7.17) Cpds with N-H O-H F-H Extra attractive force 2. Hydrogen bond Interaction between S+ H and lone pair on next molecule 3. Not a covalent bond but partway D. Summary of Forces Molecule Forces Non-polar dispersion Polar dispersion + dipole-dipole if N-H, dispersion O-H, F-H + dipole-dipole + hydrogen bonding usually : more forces = stronger interaction careful : dispersion can get large Goals Determine how the three intermolecular forces arise Determine if a molecule is polar Determine what intermolecular forces are present in a compound...
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