Does the diffusion coefficient depend on the gas?

Does the diffusion coefficient depend on the gas?

Wilke and Lee noted the coefficient 1.885Ч10−2 is not constant in reality and depends on molecular masses of the diffusing gases: This accurate definition results in a better agreement between experimental and computed data.

What is the diffusion coefficient of CO2?

Carbon dioxide in air has a diffusion coefficient of 16 mm2/s, and in water its diffusion coefficient is 0.0016 mm2/s.

Can a gas diffuse in water?

Gases can dissolve in water. The dissolving of a gas in water depends on the interaction between the molecules of the gas and the water molecules. The amount of gas that can be dissolved in water depends on the temperature of the water.

Where can I find the diffusion coefficient of a gas pair?

Almost every gaseous diffusion coefficient which was experimentally determined and reported prior to 1970 can be obtained from the annotated bibliography and table of gas pairs.

What causes gas dispersion coefficient 25?

GASEOUS DIFFUSION COEFFICIENTS 25 (2) Nonsymmetrical dispersion characteristics caused by disturbances to the velocity profile. These disturbances may be due to variations in the carrier gas flow rate or to rough tube surlaces.

How do you measure the amount of diffusion in ethanol?

The diffusion values in liquid ethanol were measured by the Taylor dispersion method at temperatures from 298.15 K to 333.15 K and pressures from 0.10 MPa to 30.00 MPa. Those in supercritical CO 2 were carried out by the chromatographic impulse response method at 308.15 K–353.15 K and up to 40.00 MPa.

What is the molecular weight of ibuprofen?

Ibuprofen (a racemate of (R,S)-2- (4-Isobutylphenyl)propionic acid, CAS RN: 15687-27-1, C13 H 18 O 2, molecular weight M: 206.3 g/mol, purity of > 98.5 %), acetone (CAS RN: 67-64-1, purity of 99.5 %), ethanol (CAS RN: 64-17-5, purity of 99.5 %) and hexane (CAS RN: 110-54-3, purity of 98.5 %) were purchased from FUJIFILM Wako Pure Chemical Co., Ltd.