Components:
(1) Ethylene,
C2H4; [74-85-1]
NIST WebBook
(2) Lanthanum chloride,
LaCl3; [10099-58-8]
NIST WebBook
(3) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Morrison, T. J.; Billett, F.; J. Chem. Soc. 1952, 3819-3822.
Variables:
Ambient temperature: 285.75 - 344.85 K
Pressure: 101.325 (1 atm) kPa
Prepared by:
Method/Apparatus/Procedure:
The degassed solvent flows in a thin film down and absorption helix containing the ethene gas plus solvent vapor at a total pressure of one atmosphere. The volume of gas absorbed is measured in an attached buret system1.
Source and Purity of Materials:
- Ethene. Prepared from ethanol and phosphoric acid.
- Lanthanum chloride. "AnalaR" material.
- Water. No information given.
Estimated Errors:
Mass concentration (m/v) (1): δk/kg-1 mol = 0.010
References
Experimental Values:
Note: The salt effect parameters were calculated from two measurements. The solubility of ethene in water, S°, and I the one molal salt solution, S. Only the solubility of the ethene in water, and the value of the salt effect parameter are given in the paper. The solubility values in the salt solution are not given.The compiler calculated the values of the salt effect parameter using the mole fraction gas solubility ratio.
Note that the first salt effect parameter above uses the author's notation with c in gram equivalents per kg water. The author's c would be better represented as m2 ((1/3) LaCl3)/mol kg-1 = 3 m2(LaCl3)/mol kg-1, that is, it would have been better If the author had expressed the salt effect parameter in terms of moles of LaCl3 per kg water rather than equivalents of LaCl3 per kg water.
| T (K) | T (°C) | x1 | β (cm3/kg) |
|---|---|---|---|
| 285.75 | 12.6 | 3.59 x 10-1 | 3.36 x 10-1 |
| 303.15 | 30.0 | 3.23 x 10-1 | 3.00 x 10-1 |
| 322.55 | 49.4 | 3.38 x 10-1 | 3.15 x 10-1 |
| 344.85 | 71.7 | 3.08 x 10-1 | 2.85 x 10-1 |
(1) For the 1-3 electrolyte the compiler changed to m = c/3 for m2/mol kg-1 in the salt effect parameter. (2) (1/m) log(xo/x)
