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Intermolecular Forces (IMF)

Intermolecular Forces (IMF). Dipole/dipole Hydrogen London. INTRAmolecular vs. INTERmolecular. INTRA molecular bonds are like the main type of bonding. (Ionic or Covalent) INTERmolecular bonding exist between molecules INTER is a lot WEAKER than INTRA!!. What are they?.

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Intermolecular Forces (IMF)

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  1. Intermolecular Forces (IMF) • Dipole/dipole • Hydrogen • London

  2. INTRAmolecular vs. INTERmolecular • INTRA molecular bonds are like the main type of bonding. (Ionic or Covalent) • INTERmolecular bonding exist between molecules • INTER is a lot WEAKER than INTRA!!

  3. What are they? • Forces that exist between molecules!!

  4. They exist in… • Mainly solids and liquids • Do not exist in gases b/c their molecules are too far apart … so no attractive forces is needed!

  5. Dipole/Dipole • Forces of attraction that exist between POLAR molecules!! • Have higher m.p./b.p. than nonpolar molecules! • Polarity depends on the orientation of the molecule (lewis structure)!!

  6. HYDROGEN BONDS • Strongest type of IMF • Occurs only b/w H and a small, highly electronegative atom such as N, O, or F • Has the highest mp/bp of all 3!!

  7. LONDON (dispersion)Forces • Occurs mainly in NONPOLAR molecules! • It is the WEAKEST force of all 3! • Has the lowest mp/bp of all 3!! • Forms temporary, instantaneous dipoles!

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