Chapter 11 - 1 States of matter...

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http://itl.chem.ufl.edu/2045_s00/lectures/FG11_001.GIF States of matter 2
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“Intra and Inter” molecular Forces Intramolecular forces: Ionic, Covalent, Metallic (corresponds to types of bonds) Intermolecular forces: Dispersion, Ion-dipole, dipole-dipole and H-bonding. Intermolecular forces (even strongest ones) are weaker than bonding forces. Bonding forces result from large charges interacting over small distances. Intermolecular forces result from small charges interacting over large distances. 3
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4 Ion- dipole and dipole-dipole forces Ion-dipole: Attraction between ion and a dipole. Ex: solution of an ionic salt http://www.chem.unsw.edu.au/coursenotes/CHEM1/nonunipass/HainesIMF/images/ionwater.jpg Dipole: dipole: Polar molecules orient in such a way that positive end of the dipole attracts the negative end of another dipole. For molecules of similar comparable molar masses, greater dipole moment, greater the attractions, thus greater boiling point. http://library.tedankara.k12.tr/chemistry/vol2/dipole-dipole%20forces/z105.htm
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5 Instantaneous and induced dipole London forces or dispersion forces (instantaneous dipole – induced dipole attraction). Polarizability.
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