Isobutane
- Formula: C4H10
- Molecular weight: 58.1222
- IUPAC Standard InChIKey: NNPPMTNAJDCUHE-UHFFFAOYSA-N
- CAS Registry Number: 75-28-5
- 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. - Other names: Propane, 2-methyl-; Trimethylmethane; 1,1-Dimethylethane; 2-Methylpropane; iso-C4H10; i-Butane; UN 1969; R 600a; tert-Butane; A 31; Methylpropane; A 31 (hydrocarbon)
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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 |
---|---|---|
35.9 ± 0.5 | Daubert, 1996 | |
35.92 | Younglove and Ely, 1987 | Uncertainty assigned by TRC = 0.02 atm; TRC |
35.815 | Levelt Sengers, Kamgar-Parsi, et al., 1983 | Uncertainty assigned by TRC = 0.099 atm; TRC |
35.831 | Waxman and Gallagher, 1983 | Uncertainty assigned by TRC = 0.59 atm; TRC |
35.92 | Goodwin and Haynes, 1982 | Uncertainty assigned by TRC = 0.30 atm; TRC |
35.85 | Connolly, 1962 | Uncertainty assigned by TRC = 0.8000 atm; TRC |
36.00 | Beattie, Edwards, et al., 1949 | Uncertainty assigned by TRC = 0.600 atm; TRC |
36.42 | Gilliland and Scheeline, 1940 | Uncertainty assigned by TRC = 0.4083 atm; TRC |
36.5407 | Seibert and Burrell, 1915 | Uncertainty assigned by TRC = 0.2631 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.
Daubert, 1996
Daubert, T.E.,
Vapor-Liquid Critical Properties of Elements and Compounds. 5. Branched Alkanes and Cycloalkanes,
J. Chem. Eng. Data, 1996, 41, 365-372. [all data]
Younglove and Ely, 1987
Younglove, B.A.; Ely, J.F.,
Thermophysical Properties of Fluids II. Methane, Ethane, Propane, Isobutane, and Normal Butane,
J. Phys. Chem. Ref. Data, 1987, 16, 577. [all data]
Levelt Sengers, Kamgar-Parsi, et al., 1983
Levelt Sengers, J.M.H.; Kamgar-Parsi, B.; Sengers, J.V.,
Thermodnamic Properties of Isobutane in the Critical Region,
J. Chem. Eng. Data, 1983, 28, 354-362. [all data]
Waxman and Gallagher, 1983
Waxman, M.; Gallagher, J.S.,
Thermodynamic Properties of Isobutane for Temperatures from 250 to 600 K and Pressures from 0.1 to 40 MPa,
J. Chem. Eng. Data, 1983, 28, 224. [all data]
Goodwin and Haynes, 1982
Goodwin, R.D.; Haynes, W.M.,
Thermophysical Properties of Propane from 85 to 700 K at Pressures to 70 MPa, NBS Monogr. (U. S.) No. 170, 249 pp., 1982. [all data]
Connolly, 1962
Connolly, J.F.,
Ideality of n-Butane:Isobutane Solutions,
J. Phys. Chem., 1962, 66, 1082. [all data]
Beattie, Edwards, et al., 1949
Beattie, J.A.; Edwards, D.G.; Marple, S.,
The Vapor Pressure, Orthobaric Liquid Density, and Critical Constants of Isobutane,
J. Chem. Phys., 1949, 17, 576. [all data]
Gilliland and Scheeline, 1940
Gilliland, E.R.; Scheeline, H.W.,
High Pressure Vapor-Liquid Equilibrium. For the Systems Propylene-Isobutane isobutane and propane + hydrogen sulfide,
Ind. Eng. Chem., 1940, 32, 48. [all data]
Seibert and Burrell, 1915
Seibert, F.M.; Burrell, G.A.,
The Critical Constants of Normal Butane, Iso-butane and Propylene and Their Vapor Pressures at Temperatures Bewtween 0 deg.C and 120 deg.C,
J. Am. Chem. Soc., 1915, 37, 2683-91. [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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