Week 1 Lecture - Environmental Chemistry (CHM302)
Week 1 Lecture - Environmental Chemistry (CHM302) CHM 302
Popular in Environmental Chemistry
Popular in Chemistry
This 2 page Class Notes was uploaded by Ana Carolina on Sunday August 30, 2015. The Class Notes belongs to CHM 302 at Arizona State University taught by Herckes in Summer 2015. Since its upload, it has received 155 views. For similar materials see Environmental Chemistry in Chemistry at Arizona State University.
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If Ana isn't already a tutor, they should be. Haven't had any of this stuff explained to me as clearly as this was. I appreciate the help!
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Date Created: 08/30/15
Environmental Chemistry Week 1 Lecture What is energy Ability to do work Thermodynamics Energy is neither created nor destroyed AU Q W Primary source Sun Geothermal is the only form of non solar energy Albedo fraction of light re ected or scattered back by the atmosphere It is bigger in the poles and lower in the ocean more absorption 246 K consumed per mL of water evaporated latent heat Atmospheric circulation heat moves from equator to poles motion in cells Ocean Conveyor moves heat from equator to poles More developed is the country more energy it uses US consumption by source petroleum gt gas gt coal gt renewable gt nuclear 2010 US primary energy overview consumption gt production gt imports gt exports 2010 Solar energy 10 is smaller than we think Arizona wants to increase to 15 2014 Oil and natural Gas are more used than other sources Who has oil 77 years left Venezuela Who has natural gas Russia Who has coal United States China is in third place 0 Fossil Fuels 03 of energy reaching earth C02 H20 gt CH20 02 combustion CH20 02 gt C02 H20 respiration Net primary productivity energy accumulating E total photosynthesis production E used by plants Petroleum and natural gas marine origin Molecular fossils used to gure out the history of an organic material Coal Terrestrial origin 250 million years ago Fuel energy Hydrogen gt Gas gt Petroleum gt Coal gt Ethanol gt Cellulose Petroleum Complex mixture of hydrocarbons S up to 10 0 up to 5 N up to 1 Most saturated Aromatic 10 Traces of V Ni Fe Na Cu Ca U Petroleum re ning destilation tower Cracking large molecules in smaller molecules Alkylation small molecules in large ones Oxidation creation of oxygenated fuels reduction of CO emissions Octane rating Premature ignition gt knocking In 1927 tested various fuels isooctane 100 no knocking nheptane 0 serious knocking Advantages liquid easy transport relatively clean comparing to wood for example industry very ef cient Disadvantages limited resources oil spills emissions It is not economically viable to recycle it after spill Spills effects on marine life some are toxic aromatics Emissions C02 greenhouse effect 502 acid rain CO health effects NO smog Do we run out of oil No only the cheap oil is running out 0 Gas Used in cookingheating Increase use in electricity generation Advantages clean easy transport Disadvantages dif cult to handle low temperature and pressure to store Fracking hydraulic fracking go really deep and start to dwell the fractured gas horizontally Concerns safety impact in drinking water waste water treatment water use air emissions seismic activity Lower 48 states uses it Arizona doesn39t Coal Advantages large reserves cheap to mine Disadvantages emission of greenhouse gases mining is dangerous diseases black lungs