IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethene with Tetracosane, 2,6,10,15,19,23-hexamethyl (squalane)

Components:
   (1) Ethene; C2H4; [74-85-1]  NIST Chemistry WebBook for detail
   (2) Tetracosane, 2,6,10,15,19,23-hexamethyl (squalane); C30H62; [110-01-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Simon, F.; Lukacs, J., Magy. Asvanyolaj-Foldaz. Intez. Kozl. (Hungary) 1977, 18, 57-66.

Variables:
   Temperature = 293.15 K to 333.15 K
   Pressure = 101.325 kPa

Prepared By:
   W. Hayduk

Experimental Remarks:

   Also available in the paper were ethene Bunsen coefficients in four transformer oils, the properties of which were not specified.

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)


t/°C	T/K	Ostwald coefficient L [cm³ gas cm^–3 solvent]	Ostwald Note	α [K_B/cm³ gas at NTP cm^–3solvent]	α Note	Mole Fraction (x₁)	x₁ Note
20	293.15	1.78	2	1.66	1	0.0373	2
40	313.15	1.43	2	1.25	1	0.0289	2
50	323.15	1.30	2	1.09	1	0.0257	2
60	333.15	1.18	2	0.970	1	0.0230	2

Notes:
   ¹  The solubility results were in the form of two equations, the first describing the temperature effect at 101.3 kPa pressure and the second the effect of pressure, to 405.2 kPa, at 313.15 K:
log K_B = 568.0378 ( T/K)^–1 – 1.1785     correlation coeff. = 0.9985
K_B = 0.0101 p/atm + 1.2241               correlation coeff. = 0.3171 (low)
   ²  The Ostwald coefficient and mole fraction solubility at 101.3 kPa were calculated by the compiler. The solvent densities were extrapolated.

Method/Apparatus/Procedure:
   The gas solubility was determined using gas chromatography and employing helium as a carrier gas.
Based on the retention times and column characteristics, the Bunsen coefficient was calculated.

Source and Purity of Materials:
   Sources and purities of gas and solvent not specified.

Estimated Errors:
   Solubility: δp₁/kPa = 2.0
δ K_B = ± 6-8% (authors)
   Temperature: δT/K = ± 0.1