Lecture 18 - Gases and Gas Laws

Lecture 18 - Gases and Gas Laws - Lecture 18 Gases and Gas...

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Lecture 18: Gases and Gas Laws •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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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 Ethylene (ethene) C 2 H 4 Polymer manufacturing (polyethylene) Helium He Lighter-than-air aircraft Hydrogen H 2 Hydrogenation of oils; possible fuel of the future Methane CH 4 Fuel (natural gas) Nitrous oxide N 2 O Anesthetic Propane C 3 H 8 Fuel for space heating (LP gas) Sulfur dioxide SO 2 Preservative, disinfectant Properties of Gases Table 10.2 Some Common Gases and Their Uses Properties of Gases •v o l um e c h a n g e s w i t h p r e s s u r e ( c a n b e compressed) o l e c h a n g e s w i t h t em p e r a t u r e •e x e r t p r e s s u r e o n w h a t e v e r s u r r o u n d s t h x p a n d i n t o w h a t e v e r v o l e i s a v a i l a b l e a s i l y d i f f u s e i n t o o n e a n o t h e r •H a v e m u c h l ow e r d e n s i t i e s t h a n l i q u i d s o r solids •c a n b e d e s c r i b e d f
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This note was uploaded on 03/12/2012 for the course CHEMISTRY 131 taught by Professor Lacey during the Fall '11 term at SUNY Stony Brook.

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Lecture 18 - Gases and Gas Laws - Lecture 18 Gases and Gas...

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