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C121 11-3 lec19GL - CHEM 121 The Other Half office:Gary...

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CHEM 121 – The Other Half Dr. Gary Leach office: TASC2 7072 tel: e-mail: 778 782 8065 [email protected] Office Hours: Wed, Fri 2-3 pm Midterm Monday, October 24 6:30 pm
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Lecture 19 October 24, 2011 Bonding: General Concepts Today What is a chemical bond? (13.1) Bonding Types (13.1) (a) Ionic bonds (b) Covalent bonds (c) Metallic bonds Ionic Bonding (13.4-13.5) Stability of Ionic Bonds Crystal Lattice Energy (L.E.) Born-Haber Cycle Factors Affecting L.E.
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Bonding Determines Physical Properties
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C 60 “Buckminsterfullerene”
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DNA, Genomics & Biomembranes Atomic Force Microscopy
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20 nm 100 nm Nanoscience
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Complexity of Atmospheric Chemistry
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The future of energy depends on reaching the “holy grail” of electricity generation finding a cheaper alternative to coal and other fossil fuels.
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Every day the sun delivers more energy than we consume in Energy the Sun Provides in one hour Energy we need in one year
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Surface Area Required to Power the World 2030 Projection (496,805 square kilometers) Solar Power Alone - Zero Emissions Areas are calculated based on an assumption of 20% PCE @ 2000 hours/yr at 1000 W/m 2 striking distance. Based on US DOE BTU estimates for 2030 (678 quads) or 44% increase over 2009.
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Solar Irradiance Map
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Coal 16% 42% Petroleum 5% Natural Gas 20% 2008 EIA Global Geothermal 0.3% Wind 1% Biomass 1% Solar power is a tiny % of global electricity Solar Power 0.1% Nuclear 14% Hydroelectric
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The Solar Potential 100,000 TW of Power Available for PV Only 0.015 % of this needed for all our power needs Typical intensity at high noon 1000 W/m 2 – one hair dryer per square meter!
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