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In class notes for October 12, 2007

In class notes for October 12, 2007 - General Chemistry...

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General Chemistry Lecture 102a In class notes for October 12, 2007 Last lecture o Real gases Today o Intermolecular attractions If we are below 0 kinetic energy, the molecules are attracted If we are above 0 kinetic energy, the molecules are pushed apart Intermolecular attractions are very weak Types of intermolecular attractions (see A) o Ion-Ion attractions Very strong and often considered bonding attractions o Ion-Dipole attractions Salt dissolved in water Also very strong o Dipole-Dipole interaction (HCl – HCl) These are partial because dipoles do not have a full charge o Ion-induced dipole Weaker than an ion-dipole interaction o Dipole-induced dipole Weaker than an ion-induced dipole o Dispersion forces Instantaneous induced dipoles-induced dipole Everything that has electrons has these Each individual attraction is weak The more electrons you have, the more possibility these will occur Becomes stronger the more you have Becomes stronger the higher the mass
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