Components:
(1) Carbon dioxide,
CO2; [124-38-9]
NIST WebBook
(2) Aerosol OT,
C20H38O7S.Na; [577-11-7]
NIST WebBook
(3) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Gjaldbæk, J. Chr.; Acta Chem. Scand. 1953, 7, 537-544.
Variables:
Ambient temperature: 298.15 K
Pressure: 101.325 kPa
Mass per 100 g water (2): 102w2 = 0 - 0.15
Prepared by:
Method/Apparatus/Procedure:
A calibrated all-glass combined manometer and bulb was enclosed in an air thermostat and shaken until equilibrium. Mercury was used for calibration and as confining liquid. The solvent was degassed in the apparatus.
The absorbed volume of gas is calculated from the initial and final amounts, both saturated with solvent vapor. The amount of solvent is determined by the weight of displaced mercury.
The mole fraction solubility values are at 1 atm assuming Henry's law is obeyed.
Details of the apparatus and procedure are given in Ref. 1 and 2.
Source and Purity of Materials:
- Prepared from potassium bicarbonate (analytical reagent) and concentrated sulfuric acid. 99.9% CO2.
- 100%. American Cyanamide Co.
- Redistilled.
Estimated Errors:
Ambient temperature: δT/K = ±0.05
Mass concentration (m/v) (1): δx1/x1 = ±0.015
References
1
Lannung, A.; J. Am. Chem. Soc. 1930, 52, 68.
2
Gjaldbæk, J. Chr.; Acta Chem. Scand. 1952, 6, 623.
Experimental Values:
| T (K) | w2 | x1 | α (cm3(g) cm-3(l) atm-1) |
|---|---|---|---|
| 298.15 | 0.0 | 6.12 x 10-4 | 7.54 x 10-1 |
| 298.15 | 1.5 x 10-1 | 6.10 x 10-4 | 7.51 x 10-1 |
| 298.15 | 1.5 x 10-1 | 6.09 x 10-4 | 7.50 x 10-1 |
(a) w2 = mass fraction of Aerosol OT
Aerosol OT = Dioctylester of the sodium salt of sulfotartaric acid. pH = 7.4.
(b) The mole fraction solubility values were adjusted to a gas partial pressure of 101.325 kPa (1 atm) by the compiler assuming Henry's law is obeyed.
(c) α = Bunsen coefficient
