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:
   Paratella, A., Riv. Combust. 1963, 17, 334-341.

Variables:
   Temperature = 373.15 K to 473.15 K
   Pressure = 4.05 to 10.13

Prepared By:
   W. Hayduk

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


t/°C	T/K	Pressure [MPa]	Pressure Note	Mole Fraction (x₁)	x₁ Note	Mole Fraction (x₂)	x₂ Note	Mole Fraction of Gas (y₁)	y₁ Note	Solubility	Solubility Note
100	373.15	4.05	1	0.306	2 Liquid	0.144	Equilibrium Constant (Heptane)y2/x2	0.900	2 Vapor	2.95	Equilibrium Constant (Ethene) y1/x1
100	373.15	6.08	1	0.450	2 Liquid	0.148	Equilibrium Constant (Heptane)y2/x2	0.919	2 Vapor	2.04	Equilibrium Constant (Ethene) y1/x1
100	373.15	8.11	1	0.599	2 Liquid	0.237	Equilibrium Constant (Heptane)y2/x2	0.905	2 Vapor	1.51	Equilibrium Constant (Ethene) y1/x1
100	373.15	10.13	1	0.775	2 Liquid	0.724	Equilibrium Constant (Heptane)y2/x2	0.837	2 Vapor	1.08	Equilibrium Constant (Ethene) y1/x1
150	423.15	4.05	1	0.245	2 Liquid	0.298	Equilibrium Constant (Heptane)y2/x2	0.775	2 Vapor	3.16	Equilibrium Constant (Ethene) y1/x1
150	423.15	6.08	1	0.371	2 Liquid	0.283	Equilibrium Constant (Heptane)y2/x2	0.822	2 Vapor	2.21	Equilibrium Constant (Ethene) y1/x1
150	423.15	8.11	1	0.506	2 Liquid	0.354	Equilibrium Constant (Heptane)y2/x2	0.925	2 Vapor	1.63	Equilibrium Constant (Ethene) y1/x1
150	423.15	10.13	1	0.670	2 Liquid	0.716	Equilibrium Constant (Heptane)y2/x2	0.764	2 Vapor	1.14	Equilibrium Constant (Ethene) y1/x1
200	473.15	4.05	1	0.195	2 Liquid	0.596	Equilibrium Constant (Heptane)y2/x2	0.520	2 Vapor	2.67	Equilibrium Constant (Ethene) y1/x1
200	473.15	6.08	1	0.304	2 Liquid	0.595	Equilibrium Constant (Heptane)y2/x2	0.586	2 Vapor	1.93	Equilibrium Constant (Ethene) y1/x1
200	473.15	8.11	1	0.433	2 Liquid	0.702	Equilibrium Constant (Heptane)y2/x2	0.602	2 Vapor	1.39	Equilibrium Constant (Ethene) y1/x1

Notes:
   ¹  Calculated by compiler.
   ²  Liquid and vapor compositions were calculated by the Compiler to satisfy the Equilibrium Constants; there were not given in the paper although they were shown in a graph.

Method/Apparatus/Procedure:
   A high pressure apparatus employing a glass capillary tube immersed in mercury was used. Agitation was by means of a magnetically-operated agitation system. A cathetometer was used to determine the quantity of solvent charged and a microburette was used to measure the volumes of gas dissolved.

Source and Purity of Materials:
   1. Ethene was prepared by reaction of Zn with dibromoethane in an alcohol solution. The purity was determined at 99.5%.
   2. Heptane was from Phillips Petroleum of the highest purity grade (unspecified).

Estimated Errors:
   Solubility: δΠ/atm = ± 0.5
δx₁ = ± 0.02
   Temperature: δT/K = ± 0.1