Lec-21-Chap-10-1P

Lec-21-Chap-10-1P - Chapter 10: Chapter 10: Gases and the...

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Chapter 10: Gases and the Atmosphere • Air pollution • Ozone depletion/UV •Acid rain • Global warming • Weather Gas % by vol Nitrogen 78.084 Oxygen 20.948 Argon 0.934 Carbon dioxide 0.031 1 ppm 100 ppb 80 ppb 20 ppb 10 ppb 1ppb 200 ppt Gas % by vol Krypton 0.0001 Carbon monoxide 0.00001 Xenon 0.000008 Ozone 0.000002 Ammonia 0.000001 Nitrogen dioxide 0.0000001 Sulfur dioxide 0.00000002 Neon 0.00182 Hydrogen 0.0010 Helium 0.00052 Methane 0.0002 Dry air at sea level 99.997% Other units: parts per million (ppm) parts per billion (ppb) by volume by volume parts per trillion (ppt) 1% = 10,000 ppm = 10,000,000 ppb The Atmosphere
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The Troposphere and Stratosphere • The atmosphere is divided (by T variation) into layers. • 75% of the mass and “weather” occur in the troposphere. 99.9% of the mass is in the 2 lowest layers. 170 190 210 230 250 270 290 Temperature (K) Altitude (km) 0 10 20 30 40 50 60 70 80 90 100 110 troposphere stratosphere mesosphere thermosphere mesopause stratopause tropopause 0 200 400 600 800 Pressure (torr) Gas Formula Typical Use Acetylene (ethyne) C 2 H 2 Welding torch fuel Ammonia NH 3 Fertilizer Argon Ar Filling for light bulbs Butane C 4 H 10 Fuel for space heating (LP gas) Carbon dioxide CO 2 Carbonation of beverages Chlorine C l 2 Disinfectant, bleach
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This note was uploaded on 11/14/2010 for the course CHE 131 taught by Professor Kerber during the Spring '08 term at SUNY Stony Brook.

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Lec-21-Chap-10-1P - Chapter 10: Chapter 10: Gases and the...

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