Components:

(1) Ethylene, C₂H₄; [74-85-1] NIST WebBook
(2) 1,2-Dimethylbenzene, C₈H₁₀; [95-47-6] NIST WebBook
(3) Ethylbenzene, C₈H₁₀; [100-41-4] NIST WebBook

Original Measurements

Nakamura, E.; Koguchi, K.; Amemiya, T.; Kogyo Kagaku Zasshi, 1966, 69, 1940-1944.

Variables:

Ambient temperature: 213.15 - 233.15 K
Pressure: 182.4 - 689.0 kPa (1.8 - 6.8 atm)

Prepared by:

W. Hayduk

Method/Apparatus/Procedure:

For lower pressures a 200 cm³ graduated glass cell was used. Solvent was charged to 100 cm³; then the cell and contents were weighed. For degassing, ethene was pressured into the cell from a 170 cm³ ss bomb; then the cell was shaken, gas evacuated and cell recharged with ethene several times. After degassing, the cell contents were equilibrated at constant temperature and pressure for 3-4 h. After the volume of solution was measured, the sealed cell was placed in a desiccator and later weighed at room temperature. For higher pressures two cells, one glass the other ss, of identical volume were used simultaneously. The same procedure was used except that the solution volume was measured in the glass cell and the final mass in the ss cell. The glass tended to fail at high pressures.

Source and Purity of Materials:

1. Ethene purity was 99.6%.
2. The 1,2-Dimethylbenzene purity was 99.9% as determined by GC.
3. Ethylbenzene source and purity not given.

Estimated Errors:

Ambient temperature: δT/K = ±0.1
Mass concentration (m/v) (1): δx₁/x₁ = ±0.02 (compiler)
Pressure: δP/P = ±0.01