CHEM121 lec notes

CHEM121 lec notes - CHEM 121 The Other Half Dr. Gary Leach...

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CHEM 121 – The Other Half Dr. Gary Leach office: TASC2 7072 tel: 778 782 8065 e-mail: gleach@sfu.ca 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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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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9 Every day the sun delivers more energy than we consume in one year . 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 42% Natural Gas 20% Petroleum 5% Biomass 1% Hydroelectric 16% Nuclear 14% 2008 EIA Global Energy Consumption Solar Power 0.1% Wind 1% Geothermal 0.3% Solar power is a tiny % of global electricity
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• 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! • Need to cover ~100x100 km with 10% efficient
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CHEM121 lec notes - CHEM 121 The Other Half Dr. Gary Leach...

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