기체 물질의 농도 환산. 830 μg/m3 SO2 and 90 μg/m3 CO

기체 물질의 농도 환산. 830 μg/m3 SO2 and 90 μg/m3 CO

 

 

An SO2 concentration is given as 830 μg/m3 at 25°C and 1 atm.

Express this concentration in ppm.

 

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▶ 25°C and 1 atm, one mole of gas occupies 24.4662 L

V = nRT / P

= (1)(0.08206)(273.15+25) / 1 = 24.4662

 

▶ molar mass of SO2 is 64.06 g/mol

▶ 830 μg/m3 = 0.830 mg/m3

 

▶ ppb = (μg/m3) × 24.4662 L / (molar mass)

▶ ppm = (mg/m3) × 24.4662 L / (molar mass)

= 0.830 × 24.4662 / 64.06 = 0.317 ppm

 

답: 0.317 ppm

 

 

(0.000830 g / 1000 L) × (24.4662 L/mol) / (64.06 g/mol) = 3.17×10^(-7)
3.17×10^(-7) × (10^6) = 0.317 ppm

 

 

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Carbon Monoxide concentration at 90°C and 6 atm is 90 μg/m3.

Express this concentration in ppm.

 

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▶ 90°C and 6 atm, one mole of gas occupies 4.9667 L

V = nRT / P

= (1)(0.08206)(273.15+90) / 6 = 4.9667

 

▶ molar mass of CO is 28.01 g/mol

▶ 90 μg/m3 = 0.090 mg/m3

 

▶ ppm = (mg/m3) × 4.9667 L / (molar mass)

= 0.090 × 4.9667 / 28.01 = 0.016 ppm

 

답: 0.016 ppm

 

 

[키워드] 기체농도환산, 기체 ppm, 기체 ppb, 대기오염, 공기오염

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