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  • convert ppm CO2 to Pa

    I could use some help trying to figure out how to convert ppm of CO2 gas into Pascals (Pa).

    Any help would be greatly appreciated.

    Thank you.

  • #2
    Re: convert ppm CO2 to Pa

    Originally posted by stepht
    I could use some help trying to figure out how to convert ppm of CO2 gas into Pascals (Pa).

    Any help would be greatly appreciated.

    Thank you.
    Ppm in a gas is normally expressed on a mole fraction basis, so 385 ppm of CO2 (in the atmosphere) is also 385 µmol/mol.

    By Dalton's law of partial pressure, the partial pressure of CO2 to total pressure will be in the same ratio.

    "Real" atmospheric pressure varies with altitude above sea level, and day-to-day with the weather; however, "standard" atmospheric pressure is 101.325 kPa.

    The partial pressure of CO2 is 385 µmol/mol x 101.325 kPa = 39 Pa. (at least on a day when real and standard pressure are the same value)

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    • #3
      Re: convert ppm CO2 to Pa

      Thank you John! This was very helpful.

      Comment


      • #4
        Re: convert ppm CO2 to Pascals

        [QUOTE=stepht;61800]I could use some help trying to figure out how to convert ppm of CO2 gas into Pascals (Pa).

        Any help would be greatly appreciated.

        Thank you.

        Comment


        • #5
          Re: convert ppm CO2 to Pascals

          [QUOTE=mkchaudhary;88892]
          Originally posted by stepht View Post
          I could use some help trying to figure out how to convert ppm of CO2 gas into Pascals (Pa).

          Any help would be greatly appreciated.

          Thank you.
          Did you read post #2 where the question was answered?

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