Ethylene
- Formula: C2H4
- Molecular weight: 28.0532
- IUPAC Standard InChI: InChI=1S/C2H4/c1-2/h1-2H2
- IUPAC Standard InChIKey: VGGSQFUCUMXWEO-UHFFFAOYSA-N
- CAS Registry Number: 74-85-1
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Isotopologues:
- Other names: Ethene; Acetene; Bicarburretted hydrogen; Elayl; Olefiant gas; C2H4; Athylen; Liquid ethyene; UN 1038; UN 1962
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Critical pressure
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
| Pc (atm) | Reference | Comment |
|---|---|---|
| 49.75 ± 0.04 | Tsonopoulos and Ambrose, 1996 | |
| 49.89 | Brunner, 1987 | Uncertainty assigned by TRC = 0.0497 atm; Visual, optical cell 30cm high. P transducer cal. vs PB.; TRC |
| 49.742 | Jahangiri, Jacobsen, et al., 1986 | Uncertainty assigned by TRC = 0.05 atm; TRC |
| 49.89 | Brunner, 1985 | Uncertainty assigned by TRC = 0.05 atm; Visual, optical cell 30cm high, P transducer cal. vs PB.; TRC |
| 49.744 | Jahangiri, 1984 | Uncertainty assigned by TRC = 0.002 atm; TRC |
| 49.744 | Hastings, Levelt Sengers, et al., 1980 | Uncertainty assigned by TRC = 0.002 atm; PVT, Burnett apparatus, PP. Unct. value one standard deviation from fitting.; TRC |
| 49.76 | Douslin and Harrison, 1976 | Uncertainty assigned by TRC = 0.04 atm; TRC |
| 50.10 | Angus, Armstrong, et al., 1974 | Uncertainty assigned by TRC = 0.02 atm; TRC |
| 50.5300 | Shim and Kohn, 1964 | Uncertainty assigned by TRC = 0.2000 atm; TRC |
| 49.95 | Diepen and Scheffer, 1948 | Uncertainty assigned by TRC = 0.99995 atm; TRC |
References
Go To: Top, Critical pressure, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Tsonopoulos and Ambrose, 1996
Tsonopoulos, C.; Ambrose, D.,
Vapor-Liquid Critical Properties of Elements and Compounds. 6. Unsaturated Aliphatic Hydrocarbons,
J. Chem. Eng. Data, 1996, 41, 645-656. [all data]
Brunner, 1987
Brunner, E.,
Fluid mixtures at high pressures VI. Phase separation and critical phenomina in 18 binary mixtures containing either pyridine or ethanoic acid,
J. Chem. Thermodyn., 1987, 19, 823. [all data]
Jahangiri, Jacobsen, et al., 1986
Jahangiri, M.; Jacobsen, R.T.; Stewart, R.B.; McCarty, R.D.,
Thermodynamic Properties of Ethylene from the Freezing Line to 450 K at Pressures to 260 MPa,
J. Phys. Chem. Ref. Data, 1986, 15, 593. [all data]
Brunner, 1985
Brunner, E.,
Fluid mixtures at high pressures II. Phase separation and critical phenomena of (ethane + an n-alkanol) and of (ethene + methanol) and (propane + methanol),
J. Chem. Thermodyn., 1985, 17, 871. [all data]
Jahangiri, 1984
Jahangiri, M.,
A thermodynamic property formulation for ethylene from the freezing line to 450 K at pressures to 260 MPa, Ph.D. Thesis, Univ. Idaho, Moscow, 1984. [all data]
Hastings, Levelt Sengers, et al., 1980
Hastings, J.R.; Levelt Sengers, J.M.H.; Balfour, F.W.,
The critical=region equation of state of ethene and the effect of small impurities,
J. Chem. Thermodyn., 1980, 12, 1009-45. [all data]
Douslin and Harrison, 1976
Douslin, D.R.; Harrison, R.H.,
Pressure, Volume, Temperature Relations of Ethylene,
J. Chem. Thermodyn., 1976, 8, 301-330. [all data]
Angus, Armstrong, et al., 1974
Angus, S.; Armstrong, B.; de Reuck, K.M.,
International Thermodynamic Tables of the Fluid State - 2 Ethylene, Butterworths, London, 1974. [all data]
Shim and Kohn, 1964
Shim, J.; Kohn, J.P.,
Vapor-Liquid Equil. Relations in Binary Sys. Ethylene-Chloroform Sys. system,
J. Chem. Eng. Data, 1964, 9, 1-2. [all data]
Diepen and Scheffer, 1948
Diepen, G.A.M.; Scheffer, F.E.C.,
On Critical Phenomena of Saturated Solutions in Binary Systems,
J. Am. Chem. Soc., 1948, 70, 4081. [all data]
Notes
Go To: Top, Critical pressure, References
- Symbols used in this document:
Pc Critical pressure - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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