GATE CE 2015 Set 1 — Question 59
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Environmental Engineering → Air Pollution → Air Quality Standards
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Question
The concentration of Sulfur Dioxide () in ambient atmosphere was measured as . Under the same conditions, the above concentration expressed in ppm is __________.Given: ; where, ; ; ; Molecular weight of .
Correct answer
0.01 to 0.012
Solution
Concentration in ppm (parts per million by volume) is defined as the ratio of the volume of the pollutant to the total volume of air, multiplied by . At constant pressure and temperature, this is equivalent to the molar ratio:
Molecular weight .
1.Calculate moles of per :
Given mass concentration .Molecular weight .
2.Total moles of air per :
From the ideal gas law, .3.Calculate ppm:
The concentration in ppm is approximately .Continue learning with Success Tracker
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