Chemistry 2210A/B Lecture Notes - Lecture 7: Anaerobic Digestion, Partial Pressure, Fluorine

• School: Western University
• Department: Chemistry
• Course: Chemistry 2210A/B
• Professor: Keith Griffiths

Document Summary

Ground level air pollution: there are many sources of air pollutants; industry and automobile emissions major contributions, many health implications, earth"s atmosphere is oxidizing; air is cleansed by reaction of gases with oxygen. Convert a concentration of 320 micrograms ( g) of so2 per cubic m3 (of air) to the parts per billion scale. (with total air p = 1 atm, temp = 27 c) Solution: first, recall that ppb means molecules of so2 per 1 billion molecules of air or moles of so2 per billion moles of air. N= (1000l x 1 atm)/ (300 k x 0. 0082 l atm mol-1 k-1) Trace gases in air: many natural sources of gases: fires, lightning, anaerobic decay, volcanic emissions. Some are reduced, in a reduced state, produced by anaerobic decay and then emitted into the air: nh3, h2s, hcl, ch4, and ch3x (x = cl, br, i: others are partially oxidized: no, so2, co.