IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Ethene with Carbowaxes; carbowax 400, carbowax 350
Components:
   (1) Carbowaxes; carbowax 400, carbowax 350; ; []  NIST Chemistry WebBook for detail
   (2) Ethene, (Ethylene); C2H4; [74-85-1]  NIST Chemistry WebBook for detail
Original Measurements:
   Hannaert, H.; Haccuria, M.; Mathieu, M.P., Ind. Chim. Belge 1967, 32, 156-164.

 Variables:
   Temperature = 273.15 K to 353.15 K

 Prepared By:
   H. L. Clever

 Experimental Remarks:
   The authors definitions are:

K = y1/x1 = mole fraction gas in gas phase ÷ mole fraction gas in liquid phase,

π/atm = total pressure,

ν = coefficient of fugacity.



The function, Kπν/atm, is equivalent to a Henry's constant in the form H1,2/atm = (f 1/atm) /x1 where f1 is the fugacity.

 Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
   
T/KTemp NoteChemical NameHenry's law constant, K [atm1]Henry Constant NoteMole Fraction (x1)Enthalpy [kcal mol–1]Remark(s)
273.15 to 353.15Temp. Interval of MeasurementsCarbowax 40083Kπυ at 293.15 K−1.693.185 Constant A
293.15 to 313.15Temp. Interval of MeasurementsCarbowax 35081.5Kπυ at 293.15 K−2.663.90 Constant A
 Notes:
   1  log (Kπν/atm) = A – (ΔH/cal mol–1)/(2.3R(T/K))

 Method/Apparatus/Procedure:
   The authors describe three methods:
1.A. [Saturat. n°1]. A measure of the static pressure of saturation in an apparatus which gave a precision of 10 - 15 %.
1.B. [Saturat. n°2]. A measure of the static pressure of saturation in an apparatus which gave a precision of 2 - 5 %.
2. [Chromato]. A gas liquid chromatographic method estimated to have a precision of 2 - 5 %.
3. [Anal. directe]. Direct analysis of the gaseous and liquid phases.

Method 2 was used for these systems.

Source and Purity of Materials:
   (1) Ethene. Air Liquide. For narcosis, 99.9 per cent.
   (2) Carbowax. Union Carbide.
Polyethylene glycols.
Carbowax 400 molecular weight 400 ± 20.
Carbowax 350 molecular weight 350 ± 15.

 Estimated Errors: