10.21 - Chemistry 102B Discussion Worksheet #15...

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Chemistry 102B – Discussion Worksheet #15 Intermolecular Forces (IMF) Chemical bonds are intramolecular forces and hold atoms together as molecules. The forces that hold molecules together in the liquid and solid states are called intermolecular forces. There are four types of intermolecular forces: 1) Electrostatic – full positive and negative charges resulting from oxidation (loss of electron to form a cation) or reduction (gain of electron resulting in an anion). Strongest type of IMF. 2) Dipole-Dipole – partial positive or negative charges, resulting from polarized bonds in which there is unequal sharing of valence electrons. This arises when electronegative elements are bonded to less electronegative species. Molecular geometry also plays a role in determining the net dipole moment of a molecule. 3) H-bond – an especially strong dipole-dipole intermolecular force. The partial negative charge comes from one of the electronegative elements F, O or N , these are called H-bond acceptors. The partial
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This note was uploaded on 02/14/2011 for the course CHEMISTRY 102 taught by Professor Whitt during the Spring '11 term at University of Illinois, Urbana Champaign.

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10.21 - Chemistry 102B Discussion Worksheet #15...

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