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APES 06.02 Ozone Flashcards

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8841628707TroposphereOzone found here can be created in small amounts naturally by a lightning storm, but that it is also considered a pollutant and is the primary ingredient in smog. It can harm vegetation by hurting its ability to photosynthesize, as well as cause respiratory illnesses in human beings.0
8841646001StratosphereOzone found here where it is important in protecting us from ultraviolet radiation from the sun.1
8841650836"Good up high, bad nearby"Describes where ozone is helpful (the stratosphere) and where it is harmful (the troposphere).2
88427552672NO + O2 → 2NO2Nitrogen oxide (NO) reacts with oxygen gas (O2) to form nitrogen dioxide (NO2), which forms a brownish haze that is characteristic of photochemical smog.3
8842769419NO2 + UV light → NO + ONitrogen dioxide (NO2) reacts with ultraviolet light to form nitrogen oxide and oxygen.4
8842923004O + O2 → O3The free atom of oxygen (O) bonds to oxygen gas (O2) to form ozone, which is considered a pollutant in the troposphere.5
8842958717Respiratory effects of having too much ozone in the troposphere-tightness in the chest -reduced lung function -damage to cells in the lung -increased susceptibility to lung infection -aggravation of asthma6
8843014532Sources of ozoneIndustrial facilities and automobile emissions, which contribute NOx and VOCs, which create a series of reactions that produce ozone under the influence of sunlight and heat.7
88430187292NO + O2 → 2NO2; NO2 + UV light → NO + O; O + O2 → O3Reactions describe the formation of ozone in the troposphere?8
8843056658CCl3F + UV light → CCl2F + ClCFC decomposes, leaving a free atom of chlorine as a product.9
8843203229Cl + O3 → ClO + O2Free atom of chlorine and ozone produce chlorine oxide and oxygen gas.10
8843333483ClO + O → Cl + O2With the addition of a free atom of oxygen, chlorine oxide decomposes.11
8843335974Cl + O → ClO + O2A free atom of chlorine combines with ozone to produce chlorine oxide and oxygen gas.12
8859932029Ozone-depleting substances-chlorofluorocarbons (CFCs), propellants, and blowing agents -hydrochlorofluorocarbons (HCFCs), also propellants and blowing agents (and used to replace CFCs) -halons, used in fire protection -methyl bromide, a soil fumigant -carbon tetrachloride, a solvent -methyl chloroform, a cleaning agent13
8860010397Montreal ProtocolAn international agreement to reduce production and consumption of ozone-depleting substances.14
8860023560Ultraviolet radiationWith _____ ______, CFCs (such as CCl3F) break down to produce free chlorine atoms (Cl), which, in turn, break down ozone O3.15

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