IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethene with Heptane

Components:
   (1) Ethene; C2H4; [74-85-1]  NIST Chemistry WebBook for detail
   (2) Heptane; C7H16; [142-82-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Shenderei, E.R.; Ivanovskii, F.P., Khim. Prom. 1963, 91, 18-37.

Variables:
   Temperature = 228.15 K to 248.15 K
   Pressure = 0.552 to 1.663

Prepared By:
   W. Hayduk

Experimental Remarks:

   Henry's constant determined for pressures below atmospheric. Graphs given for low pressure range showing that Henry's law is obeyed.

    T/K                                  228.15     238.15     248.15

    H/Atm(mole fraction)^–1          13.5         17.2                20.9

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


t/°C	T/K	Pressure [MPa]	Pressure Note	Pressure [Atm]	Mole Fraction (x₁)	Solubility [cm³ (STP)/g]
−25	248.15	0.552	1	5.45	0.2376	69.06
−25	248.15	0.556	1	5.49	0.2561	76.26
−25	248.15	0.876	1	8.65	0.3789	135.16
−25	248.15	0.902	1	8.90	0.4091	153.44
−25	248.15	1.033	1	10.19	0.4686	195.37
−25	248.15	1.382	1	13.64	0.6169	356.80
−25	248.15	1.493	1	14.73	0.6834	478.25
−25	248.15	1.597	1	15.76	0.7196	568.00
−25	248.15	1.663	1	16.41	0.7657	723.96
−35	238.15	0.551	1	5.44	0.3085	98.84
−35	238.15	0.561	1	5.54	0.3170	102.85
−35	238.15	0.786	1	7.76	0.4572	186.62
−35	238.15	0.867	1	8.56	0.4909	213.97
−35	238.15	1.305	1	12.88	0.7747	766.11
−35	238.15	1.309	1	12.92	0.7649	721.04
−35	238.15	1.425	1	14.06	0.8550	1305.30
−35	238.15	1.441	1	14.22	0.8539	1294.80
−35	238.15	1.504	1	14.84	0.8945	1877.70
−45	228.15	0.496	1	4.90	0.3636	126.58
−45	228.15	0.528	1	5.21	0.3765	133.80
−45	228.15	0.525	1	5.18	0.3742	132.50
−45	228.15	0.765	1	7.55	0.5742	298.76
−45	228.15	0.794	1	7.84	0.5929	322.74
−45	228.15	0.797	1	7.87	0.5962	324.24
−45	228.15	1.033	1	10.19	0.8161	981.15
−45	228.15	1.043	1	10.29	0.8218	1022.30
−45	228.15	1.069	1	10.55	0.8413	1176.70
−45	228.15	1.111	1	10.96	0.8908	1806.70
−45	228.15	1.132	1	11.17	0.9012	2024.69

Notes:
   ¹  Calculated by compiler. Henry's constant determined for pressure below atmospheric.

Method/Apparatus/Procedure:
   The apparatus utilized an absorption tube with a magnetic stirrer. The temperature controlled bath had two compartments, one containing methanol solution, the other containing solid dry ice in acetone. The walls of the vessels served as the heat transfer medium. Capillary tubing connected the absorber to pressure devices, gas and solvent vessels and a vacuum system. A known amount of solvent was charged into the absorber and the quantity of gas was determined by pressure difference in the gas supply vessel.

Source and Purity of Materials:
   1. Purified and analyzed by GC. Actual purity not given.
   2. Not given.

Estimated Errors:
   Solubility: δx₁/x₁ = ± 2% (compiler)
   Temperature: δT/K = ± 0.1

References:
   1. Shenderei, E.R.; Zelvenski, Ya.D.; Ivanovskii, F.P., Khim. Prom. 1960, 5, 370.