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CHEM 121 (15)
Midterm

Pre-Midterm Review Session

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Department
Chemistry
Course
CHEM 121
Professor
Tamara Kunz
Semester
Fall

Description
November 15th, 2011 (Review Session) November-15-11 8:04 AM Chapter 5: Intermolecular Forces Breaking forces between molecules Types of Forces London Forces Induced dipole (in everything) Fleeting Dipole-dipole Forces Look at VSEPR structure to determine if molecule is polar Permanent Hydrogen Bonds H's bound to F, O, N Types of Solids 1. Decide what room temperature physical state is (if possible) S8 S CH 4 G P4 S 2 S C60 S Cl2/2 G Br2 L H2O L SiO S 2 1. Gas < Liquid < Solid 2. Solids: Non-polar molecule < Polar molecule < Network covalent in terms of boiling and melting points Network covalent = 3D 1. Ionic bonding the strongest due to electron transfer; electrostatic attraction 2. Molecular weight: higher weight = higher melting and boiling point Chapter 6 [consult beginning of October 11 lecture] Writing Equations Cations written first before anions Reactions occur with minimal bond breaking/forming Bonds with dipole moments
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