o-Terphenyl
- Formula: C18H14
- Molecular weight: 230.3038
- IUPAC Standard InChIKey: OIAQMFOKAXHPNH-UHFFFAOYSA-N
- CAS Registry Number: 84-15-1
- 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. - Other names: 1,1':2',1''-Terphenyl; 1,1'-Biphenyl, 2-phenyl-; 1,2-Diphenylbenzene; 2-Phenylbiphenyl
- Permanent link for this species. Use this link for bookmarking this species for future reference.
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Donald R. Burgess, Jr.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | 67.59 ± 0.76 | kcal/mol | Review | Roux, Temprado, et al., 2008 | There are sufficient literature values to make a qualified recommendation where the suggested value is in good agreement with values predicted using thermochemical cycles or from reliable estimates. In general, the evaluated uncertainty limits are on the order of (2 to 4) kJ/mol. |
Condensed phase thermochemistry data
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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:
DH - Eugene S. Domalski and Elizabeth D. Hearing
DRB - Donald R. Burgess, Jr.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
S°liquid | 80.571 | cal/mol*K | N/A | Chang and Bestul, 1972 | DH |
Quantity | Value | Units | Method | Reference | Comment |
ΔfH°solid | 42.97 ± 0.74 | kcal/mol | Review | Roux, Temprado, et al., 2008 | There are sufficient literature values to make a qualified recommendation where the suggested value is in good agreement with values predicted using thermochemical cycles or from reliable estimates. In general, the evaluated uncertainty limits are on the order of (2 to 4) kJ/mol.; DRB |
Quantity | Value | Units | Method | Reference | Comment |
S°solid,1 bar | 71.417 | cal/mol*K | N/A | Chang and Bestul, 1972 | DH |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
88.205 | 298.15 | Chang and Bestul, 1972 | T = 250 to 360 K. Supercooled liquid below Tm 329.35 K.; DH |
Constant pressure heat capacity of solid
Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
65.667 | 298.15 | Chang and Bestul, 1972 | T = 2 to 350 K. Also data for annealed and quenched glass.; DH |
Phase change data
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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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 610.2 | K | N/A | Aldrich Chemical Company Inc., 1990 | BS |
Tboil | 605.2 | K | N/A | Weast and Grasselli, 1989 | BS |
Tboil | 455. | K | N/A | Blum-Bergmann, 1938 | Uncertainty assigned by TRC = 25. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 331. ± 2. | K | AVG | N/A | Average of 6 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 329.35 | K | N/A | Chang and Bestul, 1972, 2 | Uncertainty assigned by TRC = 0.01 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 857. ± 5. | K | N/A | Tsonopoulos and Ambrose, 1995 | |
Tc | 857. | K | N/A | Reiter, 1963 | Uncertainty assigned by TRC = 6. K; TRC |
Tc | 890.9 | K | N/A | Mandel and Ewbank, 1960 | Uncertainty assigned by TRC = 16.7 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 30. ± 6. | atm | N/A | Tsonopoulos and Ambrose, 1995 | |
Pc | 29.51 | atm | N/A | Reiter, 1963 | Uncertainty assigned by TRC = 6.0000 atm; TRC |
Pc | 34.54 | atm | N/A | Mandel and Ewbank, 1960 | Uncertainty assigned by TRC = 6.805 atm; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Vc | 0.731 | l/mol | N/A | Tsonopoulos and Ambrose, 1995 | |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 1.4 ± 0.6 | mol/l | N/A | Tsonopoulos and Ambrose, 1995 | |
ρc | 1.37 | mol/l | N/A | Reiter, 1963 | Uncertainty assigned by TRC = 0.087 mol/l; TRC |
ρc | 1.33 | mol/l | N/A | Mandel and Ewbank, 1960 | Uncertainty assigned by TRC = 0.13 mol/l; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 20.1 ± 0.1 | kcal/mol | GS | Verevkin, 1997 | Based on data from 335. to 368. K.; AC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 24.62 ± 0.1 | kcal/mol | ME | Ribeiro da Silva, Santos, et al., 2008 | Based on data from 312. to 328. K.; AC |
ΔsubH° | 24.6 ± 0.2 | kcal/mol | Review | Roux, Temprado, et al., 2008 | There are sufficient literature values to make a qualified recommendation where the suggested value is in good agreement with values predicted using thermochemical cycles or from reliable estimates. In general, the evaluated uncertainty limits are on the order of (2 to 4) kJ/mol.; DRB |
ΔsubH° | 23. ± 0.2 | kcal/mol | B | Kimura and Takagi, 1979 | AC |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
19.4 ± 0.1 | 352. | GS | Verevkin, 1997 | Based on data from 335. to 368. K.; AC |
14.5 | 591. | DSC | Back, Grzyll, et al., 1996 | Based on data from 576. to 786. K.; AC |
18.5 | 403. | N/A | Sasse, N'guimbi, et al., 1989 | Based on data from 343. to 462. K.; AC |
16.4 | 477. | A | Stephenson and Malanowski, 1987 | Based on data from 462. to 650. K.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
4.1090 | 329.35 | N/A | Chang and Bestul, 1972 | DH |
4.04 | 327.8 | DSC | Verevkin, 1997 | AC |
4.11 | 328.4 | N/A | Murthy, Paikaray, et al., 1995 | AC |
4.11 | 329.4 | N/A | Chang, 1972 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
12.48 | 329.35 | Chang and Bestul, 1972 | DH |
12.5 | 329.4 | Chang and Bestul, 1972, 2 | CAL |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
L - Sharon G. Lias
Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 7.99 ± 0.01 | eV | N/A | N/A | L |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.0 | PE | Kobayashi, 1983 | LBLHLM |
7.99 ± 0.01 | PE | Dewar and Goodman, 1972 | LLK |
8.43 | CTS | Slifkin and Allison, 1967 | RDSH |
8.64 ± 0.05 | EI | Gallegos, 1967 | RDSH |
8.2 | PE | Kobayashi, 1983 | Vertical value; LBLHLM |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C17H11+ | 12.0 ± 0.1 | ? | EI | Gallegos, 1967 | RDSH |
C18H12+ | 11.7 ± 0.1 | H2 | EI | Gallegos, 1967 | RDSH |
C18H13+ | 11.7 ± 0.1 | H | EI | Gallegos, 1967 | RDSH |
IR Spectrum
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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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Gas Phase Spectrum
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Additional Data
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Owner | NIST Standard Reference Data Program Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | Sadtler Research Labs Under US-EPA Contract |
State | gas |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR Spectrum, Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | Japan AIST/NIMC Database- Spectrum MS-NW-8149 |
NIST MS number | 228204 |
Gas Chromatography
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Packed | SE-30 | 200. | 1876. | Shlyakhov, Anvaer, et al., 1975 | |
Packed | Polymethylsiloxane, (PMS-20000) | 50. | 1910.1 | Ainshtein and Shulyatieva, 1972 | He, Chromosorb W; Column length: 2. m |
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 | 1903. | Rostad and Pereira, 1986 | 30. m/0.26 mm/0.25 μm, He, 50. C @ 4. min, 6. K/min, 300. C @ 20. min |
Van Den Dool and Kratz RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Packed | SE-30 | 1859. | Peng, Ding, et al., 1988 | Supelcoport; Chromosorb; Column length: 3.05 m; Program: 40C(5min) => 10C/min => 200C or 250C (60min) |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-5 MS | 1886. | Radulovic, Dordevic, et al., 2010 | 30. m/0.25 mm/0.25 μm, Helium, 5. K/min, 290. C @ 10. min; Tstart: 70. C |
Normal alkane RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 2649. | Peng, Yang, et al., 1991 | Program: not specified |
Lee's RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-5 | 317.42 | Marynowski, Pieta, et al., 2004 | 60. m/0.25 mm/0.25 μm, He, 3. K/min; Tstart: 35. C; Tend: 300. C |
Capillary | DB-5 | 321.7 | Durlak, Biswas, et al., 1998 | 30. m/0.25 mm/0.25 μm, 15. K/min; Tstart: 50. C; Tend: 300. C |
Capillary | DB-5 | 317.43 | Rostad and Pereira, 1986 | 30. m/0.26 mm/0.25 μm, He, 50. C @ 4. min, 6. K/min, 300. C @ 20. min |
Capillary | SE-52 | 321.99 | Lee, Vassilaros, et al., 1979 | 12. m/0.3 mm/0.34 μm, He, 2. K/min; Tstart: 50. C; Tend: 250. C |
Lee's RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Methyl Silicone | 316.63 | Eckel, Ross, et al., 1993 | Program: not specified |
Capillary | Methyl Silicone | 317.43 | Eckel, Ross, et al., 1993 | Program: not specified |
Capillary | SE-52 | 321.99 | Shlyakhov, 1984 | Program: not specified |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Roux, Temprado, et al., 2008
Roux, M.V.; Temprado, M.; Chickos, J.S.; Nagano, Y.,
Critically Evaluated Thermochemical Properties of Polycyclic Aromatic Hydrocarbons,
J. Phys. Chem. Ref. Data, 2008, 37, 4, 1855-1996. [all data]
Chang and Bestul, 1972
Chang, S.S.; Bestul, A.B.,
Heat capacity and thermodynamic properties of o-terphenyl crystal, glass and liquid,
J. Chem. D Phys., 1972, 56, 503-516. [all data]
Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc.,
Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]
Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]
Blum-Bergmann, 1938
Blum-Bergmann, O.,
J. Am. Chem. Soc., 1938, 60, 1999. [all data]
Chang and Bestul, 1972, 2
Chang, S.S.; Bestul, A.B.,
Heat Capacity and Thermodynamic Properties of o-Terphenyl Crystal, Glass, and Liquid,
J. Chem. Phys., 1972, 56, 1, 503, https://doi.org/10.1063/1.1676895
. [all data]
Tsonopoulos and Ambrose, 1995
Tsonopoulos, C.; Ambrose, D.,
Vapor-Liquid Critical Properties of Elements and Compounds. 3. Aromatic Hydrocarbons,
J. Chem. Eng. Data, 1995, 40, 547-558. [all data]
Reiter, 1963
Reiter, R.W.,
, NASA Doc. N63-19495 1963 1963, 1963. [all data]
Mandel and Ewbank, 1960
Mandel, H.; Ewbank, N.,
, Atomics International NAA-S-R-5129 1960, 1960. [all data]
Verevkin, 1997
Verevkin, S.P.,
Thermochemistry of substituted benzenes. Experimental standard molar enthalpies of formation of o-, m-, and p-terphenyls and 1,3,5-triphenylbenzene,
J. Chem. Thermodyn., 1997, 29, 1495-1501. [all data]
Ribeiro da Silva, Santos, et al., 2008
Ribeiro da Silva, Manuel A.V.; Santos, Luís M.N.B.F.; Lima, Luís M. Spencer S.,
Standard molar enthalpies of formation and of sublimation of the terphenyl isomers,
The Journal of Chemical Thermodynamics, 2008, 40, 3, 375-385, https://doi.org/10.1016/j.jct.2007.08.008
. [all data]
Kimura and Takagi, 1979
Kimura, Takayoshi; Takagi, Sadao,
Enthalpies of solution of o-, m-, and p-terphenyls in benzene at 298.15 K,
The Journal of Chemical Thermodynamics, 1979, 11, 1, 47-55, https://doi.org/10.1016/0021-9614(79)90082-X
. [all data]
Back, Grzyll, et al., 1996
Back, Dwight D.; Grzyll, Lawrence R.; Corrigan, Mary,
DSC enthalpy of vaporization measurements of high temperature two-phase working fluids,
Thermochimica Acta, 1996, 272, 53-63, https://doi.org/10.1016/0040-6031(95)02615-0
. [all data]
Sasse, N'guimbi, et al., 1989
Sasse, K.; N'guimbi, J.; Jose, J.; Merlin, J.C.,
Tension de vapeur d'hydrocarbures polyaromatiques dans le domaine 10-3--10 Torr,
Thermochimica Acta, 1989, 146, 53-61, https://doi.org/10.1016/0040-6031(89)87075-3
. [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]
Murthy, Paikaray, et al., 1995
Murthy, S.S.N.; Paikaray, A.; Arya, N.,
Molecular relaxation and excess entropy in liquids and their connection to the structure of glass,
J. Chem. Phys., 1995, 102, 20, 8213, https://doi.org/10.1063/1.469232
. [all data]
Chang, 1972
Chang, S.S.,
Heat Capacity and Thermodynamic Properties of o-Terphenyl Crystal, Glass, and Liquid,
J. Chem. Phys., 1972, 56, 1, 503, https://doi.org/10.1063/1.1676895
. [all data]
Kobayashi, 1983
Kobayashi, T.,
Conformational analysis of terphenyls by photoelectron spectroscopy,
Bull. Chem. Soc. Jpn., 1983, 56, 3224. [all data]
Dewar and Goodman, 1972
Dewar, M.J.S.; Goodman, D.W.,
Photoelectron spectra of molecules. Part 5.--Polycyclic aromatic hydrocarbons,
J. Chem. Soc. Faraday Trans. 2, 1972, 68, 1784. [all data]
Slifkin and Allison, 1967
Slifkin, M.A.; Allison, A.C.,
Measurement of ionization potentials from contact charge transfer spectra,
Nature, 1967, 215, 949. [all data]
Gallegos, 1967
Gallegos, E.J.,
Mass spectrometry of some polyphenyls,
J. Phys. Chem., 1967, 71, 1647. [all data]
Shlyakhov, Anvaer, et al., 1975
Shlyakhov, A.F.; Anvaer, B.I.; Zolotareva, O.V.; Romina, N.N.; Novikova, N.V.; Koreshkova, R.I.,
On the possibility of group indentification of hydrocarbons by gas chromatography from temperature coefficients of retention indices,
Zh. Anal. Khim., 1975, 30, 788-792. [all data]
Ainshtein and Shulyatieva, 1972
Ainshtein, A.A.; Shulyatieva, T.I.,
Retention indices of alkyl- and arylchlorosilanes,
Zh. Anal. Khim., 1972, 27, 816-821. [all data]
Rostad and Pereira, 1986
Rostad, C.E.; Pereira, W.E.,
Kovats and Lee retention indices determined by gas chromatography/mass spectrometry for organic compounds of environmental interest,
J. Hi. Res. Chromatogr. Chromatogr. Comm., 1986, 9, 6, 328-334, https://doi.org/10.1002/jhrc.1240090603
. [all data]
Peng, Ding, et al., 1988
Peng, C.T.; Ding, S.F.; Hua, R.L.; Yang, Z.C.,
Prediction of Retention Indexes I. Structure-Retention Index Relationship on Apolar Columns,
J. Chromatogr., 1988, 436, 137-172, https://doi.org/10.1016/S0021-9673(00)94575-8
. [all data]
Radulovic, Dordevic, et al., 2010
Radulovic, N.; Dordevic, N.; Markovic, M.; Palic, R.,
Volatile constituents of Glechoma Hirsuta Waldst. Kit. and G. Hederacea L. (Lamiaceae),
Bull. Chem. Soc. Ethiop., 2010, 24, 1, 67-76, https://doi.org/10.4314/bcse.v24i1.52962
. [all data]
Peng, Yang, et al., 1991
Peng, C.T.; Yang, Z.C.; Ding, S.F.,
Prediction of rentention idexes. II. Structure-retention index relationship on polar columns,
J. Chromatogr., 1991, 586, 1, 85-112, https://doi.org/10.1016/0021-9673(91)80028-F
. [all data]
Marynowski, Pieta, et al., 2004
Marynowski, L.; Pieta, M.; Janeczek, J.,
Composition and source of polycyclic aromatic compounds in deposited dust from selected sites around the Upper Silesia, Poland,
Geol. Q., 2004, 48, 2, 169-180. [all data]
Durlak, Biswas, et al., 1998
Durlak, S.K.; Biswas, P.; Shi, J.; Bernhard, M.J.,
Characterization of polycyclic aromatic hydrocarbon particulate and gaseous emissions from polystyrene combustion,
Environ. Sci. Technol., 1998, 32, 15, 2301-2307, https://doi.org/10.1021/es9709031
. [all data]
Lee, Vassilaros, et al., 1979
Lee, M.L.; Vassilaros, D.L.; White, C.M.; Novotny, M.,
Retention Indices for Programmed-Temperature Capillary-Column Gas Chromatography of Polycyclic Aromatic Hydrocarbons,
Anal. Chem., 1979, 51, 6, 768-773, https://doi.org/10.1021/ac50042a043
. [all data]
Eckel, Ross, et al., 1993
Eckel, W.P.; Ross, B.; Isensee, R.K.,
Pentobarbital found in ground water,
Ground Water, 1993, 31, 5, 801-804, https://doi.org/10.1111/j.1745-6584.1993.tb00853.x
. [all data]
Shlyakhov, 1984
Shlyakhov, A.F.,
Gas chromatography in organic geochemistry, Nedra, Moscow, 1984, 221. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
AE Appearance energy Cp,liquid Constant pressure heat capacity of liquid Cp,solid Constant pressure heat capacity of solid IE (evaluated) Recommended ionization energy Pc Critical pressure S°liquid Entropy of liquid at standard conditions S°solid,1 bar Entropy of solid at standard conditions (1 bar) Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature Vc Critical volume ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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