2-Pentene, (Z)-
- Formula: C5H10
- Molecular weight: 70.1329
- IUPAC Standard InChI: InChI=1S/C5H10/c1-3-5-4-2/h3,5H,4H2,1-2H3/b5-3-
- IUPAC Standard InChIKey: QMMOXUPEWRXHJS-HYXAFXHYSA-N
- CAS Registry Number: 627-20-3
- 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. - Stereoisomers:
- Other names: (Z)-2-Pentene; cis-β-Amylene; cis-Pentene; cis-2-Pentene; 2-(Z)-C5H10; cis-Pentene-2; Pentene-2, cis-; (Z)-pent-2-ene
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Condensed phase thermochemistry data
Go To: Top, References, Notes
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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -53.35 ± 0.42 | kJ/mol | Eqk | Wiberg, Wasserman, et al., 1984 | Trifluoroacetolysis, hrxn[kcal/mol]=-10.92±0.01; ALS |
| ΔfH°liquid | -53.49 ± 0.62 | kJ/mol | Ccb | Good and Smith, 1979 | ALS |
| ΔfH°liquid | -55.8 ± 1.0 | kJ/mol | Chyd | N/A | DRB |
| ΔfH°liquid | -60.0 ± 0.3 | kJ/mol | Cm | Coops, Mulder, et al., 1946 | DRB |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -3343.21 ± 0.54 | kJ/mol | Ccb | Good and Smith, 1979 | Corresponding ΔfHºliquid = -53.49 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -3336.7 ± 0.3 | kJ/mol | Cm | Coops, Mulder, et al., 1946 | Reanalyzed by Cox and Pilcher, 1970, Original value = -3335.3 ± 0.3 kJ/mol; Corresponding ΔfHºliquid = -60.04 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid | 258.8 | J/mol*K | N/A | Chao, Hall, et al., 1983 | DH |
| S°liquid | 258.61 | J/mol*K | N/A | Todd, Oliver, et al., 1947 | DH |
Constant pressure heat capacity of liquid
| Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 151.8 | 298.15 | Chao, Hall, et al., 1983 | T = 13 to 295 K.; DH |
| 151.71 | 298.15 | Todd, Oliver, et al., 1947 | T = 12 to 300 K.; DH |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Wiberg, Wasserman, et al., 1984
Wiberg, K.B.; Wasserman, D.J.; Martin, E.,
Enthalpies of hydration of alkenes. 2. The n-heptenes and n-pentenes,
J. Phys. Chem., 1984, 88, 3684-3688. [all data]
Good and Smith, 1979
Good, W.D.; Smith, N.K.,
The enthalpies of combustion of the isomeric pentenes in the liquid state. A warning to combustion calorimetrists about sample drying,
J. Chem. Thermodyn., 1979, 11, 111-118. [all data]
Coops, Mulder, et al., 1946
Coops, J.; Mulder, D.; Dienske, J.W.; Smittenberg, J.,
The heats of combustion of a number of hydrocarbons,
Rec. Trav. Chim. Pays/Bas, 1946, 65, 128. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Chao, Hall, et al., 1983
Chao, J.; Hall, K.R.; Yao, J.M.,
Thermodynamic properties of simple alkenes,
Thermochim. Acta, 1983, 64(3), 285-303. [all data]
Todd, Oliver, et al., 1947
Todd, S.S.; Oliver, G.D.; Huffman, H.M.,
The heat capacities, heats of fusion and entropies of the six pentenes,
J. Am. Chem. Soc., 1947, 69, 1519-1525. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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