Chapter 12 & 13.  Chemical properties arise from intramolecular forces- bonding within the molecule  Physical properties arise from intermolecular forces-

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Presentation transcript:

Chapter 12 & 13

 Chemical properties arise from intramolecular forces- bonding within the molecule  Physical properties arise from intermolecular forces- (non-bonding)forces between molecules

 Potential energy-electrostatic attractions/bonds within molecules  draw molecules together  Kinetic energy-random collisions  push molecules apart  Observe a diatomic molecule  Energy/chemprime/CoreChem3AThe_Atomic_Theory-939.html Energy/chemprime/CoreChem3AThe_Atomic_Theory-939.html

 IMF oppose the randomizing forces of kinetic energy  Ion-Dipole  Dipole-Dipole  Hydrogen Bonding  Ion-induced Dipole and Dipole induced Dipole  London (Dispersion)  Create a Graphic Organizer with the above terms; distinguish each, give examples and describe its impact on melting/boiling pt/etc

 IMFs  Surface Tension-  Viscosity-  Capillary action- Amount of force required to break through the surface molecular layer. The resistance of liquids to flow dependent on IMF-strong->high; polar->high, temperature-> low when cold & low KE, molecular shape-more complex->high spontaneous rising of a liquid through a narrow tube against gravity due to attractive forces between the liquid and tube wall.