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15 Cards in this Set
- Front
- Back
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what's ozone?
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o3
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ozone occurs naturally at concentrations of . . .
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60 micrograms/m^3
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what is the max acceptable exposure over an 8-hour period of ozone (established by the world health organization)
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110 micrograms/m^3
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when do harmful ozone concentrations peak?
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in the afternoon
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what is NO_x?
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NO and NO2 (nitrogen oxide)
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when do hydrocarbon emissions and NOx peak?
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early in the day
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what do hydrocarbon emissions and NOx result from?
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incomplete combustion from automobiles
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aldehydes are . . .
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partially oxidized hydrocarbons
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the larger the rate constant,
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the faster the reaction
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what is the differential rate expression for A?
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d[A]/dt = -k_1[A]
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the expression for change in concentration of C with time can be written as...
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d[C]/dt = k_2[B]
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the concentration of species C is determined by . . .
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the rate-determining step
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we can conclude that the differential-rate law for species B is equal to zero by using the
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steady state approximation
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the steady state approximation means that...
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B is consumed as quickly as it is formed
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the steady state approximation can be applied when . . .
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k2>>k1
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