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Environmental EngineeringThe air quality standard for ozone (O3) is 80 ppbv.Express that standard in micrograms per cubic meter at 1 atm pressure and 25oC.At the elevation of Denver, the pressure is 0.82 atm. Express the sulfur dioxide standard at that pressure and a temperature of 15oC.

Question

Environmental Engineering

The air quality standard for ozone (O3) is 80 ppbv.

  • Express that standard in micrograms per cubic meter at 1 atm pressure and 25oC.
  • At the elevation of Denver, the pressure is 0.82 atm. Express the sulfur dioxide standard at that pressure and a temperature of 15oC.
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Step 1

The air quality standard for ozone is 80 ppbv.

The temperate (T) is 25ºC.

Convert the unit of temperature as follows:

T 25 273.15K
=298.15K
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T 25 273.15K =298.15K

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Step 2

The pressure (P) is 1 atm.

The molecular weight of ozone is 16g/mol.

Convert the air quality standards for ozone in µg/m3 as follows:

ppbv x103molecular.wt 273.15K
T(K)
P(atm)
X
X
22.414
latm
80x 10 x3 x16 273.15K latm
X
X
22.414
298.15K latm
1000ug
3
0.157mg /m2x
1mg
=157ug /m3
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ppbv x103molecular.wt 273.15K T(K) P(atm) X X 22.414 latm 80x 10 x3 x16 273.15K latm X X 22.414 298.15K latm 1000ug 3 0.157mg /m2x 1mg =157ug /m3

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Step 3

Answer:

The air quality standard for ozone...

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