9-23-08[lecture7]ll

9-23-08[lecture7]ll - Lecture 9/23/2008 (LL) TEST: Moved to...

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Lecture 9/23/2008 (LL) TEST: Moved to Thursday 2 nd i-clicker question B) CH 3 OH- Has the strongest dipole moment Dipole moment has to do with where the electrons prefer to spend most of their time (on which atom). The electrons prefer to spend time on the most electronegative atom or bond. -Strength of the dipole moment depends on the strength of the bonds between atoms in a molecule Non polar molecule - Dipole moments cancel each other ex: CCl 4. Electrons are evenly distributed around the molecule Polar molecule - Electrons are not evenly distributed around molecule, there is a non zero dipole moment. -When figuring out dipole moment it is helpful to write out the Lewis structure Explaining macroscopic behavior by particle level interactions -Matter changes because of energy being added or removed H 2 O is a small molecule with large dipoles Dipole- Dipole attractions are predominately polar London Dispersion Forces CCl 4 -small molecule with nearly zero dipoles Liquid particles slide past each other, random
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9-23-08[lecture7]ll - Lecture 9/23/2008 (LL) TEST: Moved to...

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