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Atmospheric Chemistry and Physics From Air Pollution to Climate Change, 3rd Edition
By John H. Seinfeld
Email: richard@qwconsultancy.com
ATMOSPHERIC CHEMISTRY AND PHYSICS: FROM AIR POLLUTION TO CLIMATE CHANGE Third Edition John H. Seinfeld California Institute of Technology Spyros N. Pandis University of Patras and Carnegie Mellon University John Wiley 2015
1.4
CH3SCH3 concentrations range from 250 to 500 ng m-3 (0.25 to 0.50 μg m-3).
ξ CH SCH (ppm) = 3
3
=
RT pM CH 3SCH 3
[CH3SCH 3 ] (μg m −3 )
(8.314) (298) (0.25) = 9.86 × 10-5 ppm
(1.0133 × 10 ) 5
= 0.0986 ppb At 0.5 μg m-3, ξ CH 3SCH 3 = 0.197 ppb
1.5 ⎛ 3.7879 L ⎞ ⎛ 1000 cm 3 ⎞ ⎛ 0.85 g ⎞ ⎟⎟ ⎜ ⎟⎟ ⎜⎜ 500 gallons ⎜⎜ = 1,609,857.5 g Gasoline 3 ⎟ L ⎝ gallon ⎠ ⎝ ⎠ ⎝ cm ⎠
C: 12.01 g/mol H: 1.01 g/mol O: 16.00 g/mol gasoline (C8H18) = [8(12.01) + 18(1.01)] g/mol = 114.26 g/mol CO2: (12.01 + 2·16.00) g/mol = 44.01 g/mol ⎞ ⎛ 44.01 g CO 2 ⎞ ⎛ 1 kg ⎞ ⎟⎟ ⎜⎜ ⎟⎟ ⎟⎟ ⎜⎜ 1 mol gasoline 1 mol CO 1000 g ⎠ ⎠⎝ ⎠⎝ 2 ⎠⎝ ⎞⎛
⎛
(1,609,857.5 g )⎜⎜ 1 mol gasoline ⎟⎟ ⎜⎜ 8 mol CO 2 ⎝
= 4960 kg CO2
114.26 g