Spiropentane
- Formula: C5H8
- Molecular weight: 68.1170
- IUPAC Standard InChIKey: OGNAOIGAPPSUMG-UHFFFAOYSA-N
- CAS Registry Number: 157-40-4
- 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: Spiro[2.2]pentane
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Phase change 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 312.1 | K | N/A | Majer and Svoboda, 1985 | |
Tboil | 303.18 | K | N/A | Cleaves and Sherrick, 1946 | Uncertainty assigned by TRC = 0.1 K; same as in 1946 sla 1; TRC |
Tboil | 312.18 | K | N/A | Slabey, 1946 | Uncertainty assigned by TRC = 0.1 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 166.10 | K | N/A | Cleaves and Sherrick, 1946 | Uncertainty assigned by TRC = 0.1 K; same as in 1946 sla 1; TRC |
Tfus | 166.10 | K | N/A | Slabey, 1946 | Uncertainty assigned by TRC = 0.1 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 166.14 | K | N/A | Scott, Finke, et al., 1950 | Uncertainty assigned by TRC = 0.05 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 506.4 | K | N/A | Majer and Svoboda, 1985 | |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 27.7 | kJ/mol | N/A | Majer and Svoboda, 1985 | |
ΔvapH° | 27.5 ± 0.1 | kJ/mol | C | Scott, Finke, et al., 1950, 2 | AC |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
26.76 | 312.1 | N/A | Majer and Svoboda, 1985 | |
26.748 | 312.13 | N/A | Scott, Finke, et al., 1950, 2 | P = 101.325 kPa; DH |
28.6 | 291. | A | Stephenson and Malanowski, 1987 | Based on data from 276. to 344. K. See also Scott, Finke, et al., 1950, 3.; AC |
28.3 ± 0.1 | 283. | C | Scott, Finke, et al., 1950, 2 | AC |
26.7 ± 0.1 | 312. | C | Scott, Finke, et al., 1950, 2 | AC |
Enthalpy of vaporization
ΔvapH =
A exp(-βTr) (1 − Tr)β
ΔvapH =
Enthalpy of vaporization (at saturation pressure)
(kJ/mol)
Tr = reduced temperature (T / Tc)
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Temperature (K) | A (kJ/mol) | β | Tc (K) | Reference | Comment |
---|---|---|---|---|---|
283. to 312. | 41.44 | 0.2778 | 506.4 | Majer and Svoboda, 1985 |
Entropy of vaporization
ΔvapS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
85.70 | 312.13 | Scott, Finke, et al., 1950, 2 | P; DH |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
276.78 to 343.98 | 4.04134 | 1089.801 | -42.079 | Scott, Finke, et al., 1950, 2 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
6.4333 | 166.14 | Scott, Finke, et al., 1950, 2 | DH |
6.43 | 166.1 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
38.72 | 166.14 | Scott, Finke, et al., 1950, 2 | DH |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Majer and Svoboda, 1985
Majer, V.; Svoboda, V.,
Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]
Cleaves and Sherrick, 1946
Cleaves, A.P.; Sherrick, M.E.,
, Natl. Advis. Comm. Aeronaut., 1946. [all data]
Slabey, 1946
Slabey, V.A.,
, Natl. Advis. Comm. Aeronaut., 1946. [all data]
Scott, Finke, et al., 1950
Scott, D.W.; Finke, H.L.; Hubbard, W.N.; McCullough, J.P.; Gross, M.E.; Williamson, K.D.; Waddington, G.; Huffman, H.M.,
Spiropentane: Heat Capacity, Heats of Fusion and Vaporization, Vapor Pressure, Entropy and Thermodynamic Functions,
J. Am. Chem. Soc. 72, 1950, 4664 1950. [all data]
Scott, Finke, et al., 1950, 2
Scott, D.W.; Finke, H.L.; Hubbard, W.N.; McCullough, J.P.; Gross, M.E.; Williamson, K.D.; Waddington, G.; Huffman, H.M.,
Spiropentane: heat capacity, heats of fusion and vaporization, vapor pressure, entropy and thermodynamic functions,
J. Am. Chem. Soc., 1950, 72, 4664-4668. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Scott, Finke, et al., 1950, 3
Scott, D.W.; Finke, H.L.; Gross, M.E.; Guthrie, G.B.; Huffman, H.M.,
2,3-Dithiabutane: low temperature heat capacity, heat of fusion, heat of vaporization, vapor pressure, entropy and thermodynamic functions,
J. Am. Chem. Soc., 1950, 72, 2424-2430. [all data]
Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D.,
Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III,
J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ΔvapS Entropy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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