IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethene with Cycloheptanone

Components:
   (1) Cycloheptanone; C7H12O; [502-42-1]  NIST Chemistry WebBook for detail
   (2) Ethene; C2H4; [74-85-1]  NIST Chemistry WebBook for detail

Original Measurements:
   Gallardo, M. A.; Lopez, M. C.; Urieta, J. S.; Gutierrez-Losa, C., Fluid Phase Equil. 1990, 58, 159-172.

Variables:
   Temperature = 273.15 K to 303.15 K
   Pressure = 101.32 kPa

Prepared By:
   C.L. Young

Experimental Remarks:

   The compiler calculated the Bunsen and Ostwald coefficients. Density data were calculated from the equation given in the source and ideal gas behavior was assumed.

The authors fitted the solubility data to the equation:

– ln x₁ = –8.4142 + 1172.26/(T/K)

The enthalpy and entropy of solution at 298.15 K and a partial pressure of 101.32 kPa were:
ΔH = –9.75 kJ mo1^–1 and ΔS = –0.070 J K^–1 mol^–1.

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


T/K	Ostwald coefficient L [cm³ cm^–3]	α [cm³ (STP) cm^–3 atm^–1]	Mole Fraction (x₁)
273.15	32.00	32.00	162.4
283.15	28.02	27.03	138.7
293.15	25.01	23.31	120.9
298.15	23.69	21.71	113.2
303.15	22.42	20.20	105.9

Notes:

Method/Apparatus/Procedure:
   The solubility apparatus, based on the design of Ben-Naim and Baer, was described earlier (Ref. 1). The essential parts were a gas buret, mercury manometer, and solution vessel. The solvent was degassed in the solution vessel. The saturation and volumetric measurements were carried out using solvent saturated gas.
It appears that the mole fraction solubility at one atm was estimated from the raw data by assuming Henry's law is obeyed and that the partial pressure of the solvent is given by Raoult's law.

Source and Purity of Materials:
   (1) Sociedad Español del Oxigeno. purity 99.90 mole per cent.
   (2) Merck and Co. sample; purity 98.2 mole per cent.
   (3) Fluka sample; purity 98.2 mole per cent.
Major impurities had similar gas solubilities.

Estimated Errors:
   Solubility: δ x/x = ± 0.007
   Temperature: δT/K = ± 0.05

References:
   1. Carnicer, J.; Gibanel, F.;, Urieta, J.S.; Gutierrez Losa, C., Rev. Acad. Ciencias Zaragoza 1979, 1340, 115.