density of carbon dioxide gas?

Question

Hi guys,What is the density of carbon dioxide gas at –25.2°C and 98.0 kPa?sorry ive tried many times but cant answer it

Prof. Clark Walter · Accepted Answer

Use the ideal gas law PV =nRT. First change it into PV = (m/M)RT (m= mass, M is grams per mole). Since density is m/v, solve:MPV=mRT (MP)/(RT) = m/V(MP)/(RT) = dM = 44 g/mol (co2 is one carbon and two hydrogens)P = 0.967 atmR = 0.0821 (latm)/(molk) its the Ideal gas constantT = 247.95 KWhen you plug it in and solve, you get : 2.09 g/L

Prof. Clark Walter · Answer

The Wikipedia page lists several densities for CO2 at different states.http://en.wikipedia.org/wiki/Carbon_dioxideI bet you could do a varient of P1V1T1=P2V2T2, change V to density and figure it out.CO2 is 1562 kg/m^3 at 1 atm and -78.5C. M^3=1000L so it's 1562000grams/1000L, which makes it 1562g/1L.Convert kPa to atm to make units the same: 98 kPa = 0.9672 atm http://www.unitconversion.org/pressure/standard-at...Now you have:0.9672 atm (-25.2C) (1562g/1L) = 1 atm (-78.5 C) (x g/1L)-38071.31(/1L) = -78.5x(/1L)x = 484.995g/1L, which converts back to:484.995g/1L (1kg/1000g)(1000L/1m^3) = 484.995kg/m^3Don't know if it's the correct formula, but the math is sound!Hope this helps! 🙂

Alycia Zemlak

density of carbon dioxide gas?

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