2-Propenenitrile
- Formula: C3H3N
- Molecular weight: 53.0626
- IUPAC Standard InChIKey: NLHHRLWOUZZQLW-UHFFFAOYSA-N
- CAS Registry Number: 107-13-1
- 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: Acrylonitrile; Acrylon; Carbacryl; Cyanoethylene; Fumigrain; Propenenitrile; Ventox; Vinyl cyanide; VCN; CH2CHCN; Acritet; Acrylnitril; Acrylonitrile monomer; Akrylonitryl; Cianuro di vinile; Cyanure de vinyle; ENT 54; Miller's fumigrain; Nitrile acrilico; Nitrile acrylique; TL 314; Akrylonitril; Rcra waste number U009; UN 1093; Vinylkyanid; Cyanoethene; Propenitrile; Propenonitrile; NSC 6362
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, 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 as indicated in comments:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | 41.25 | kcal/mol | N/A | Baroody and Carpenter, 1972 | Value computed using ΔfHliquid° value of 140.0 kj/mol from Baroody and Carpenter, 1972 and ΔvapH° value of 32.6 kj/mol from Hall and Baldt, 1971.; DRB |
ΔfH°gas | 42.95 | kcal/mol | Ccr | Hall and Baldt, 1971 | ALS |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°liquid | 33.5 | kcal/mol | Ccb | Baroody and Carpenter, 1972 | ALS |
ΔfH°liquid | 35.16 | kcal/mol | Ccr | Hall and Baldt, 1971 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -419.79 ± 0.10 | kcal/mol | Ccr | Hall and Baldt, 1971 | ALS |
ΔcH°liquid | -420.5 ± 0.7 | kcal/mol | Ccb | Davis and Wiedeman, 1945 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 42.761 | cal/mol*K | N/A | Finke, Messerly, et al., 1972 | DH |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
23.6 | 298.15 | Mirzaliev, Shakhuradov, et al., 1987 | T = 213 to 333 K. Unsmoothed experimental datum given as 1.898 kJ/kg*K at 293 K. Cp(liq) = 2.05105 + 0.00465503T/K + 1.34722x10-5T2/K2 kJ/kg*K (213 to 333 K). Note, second coefficient should be negative.; DH |
25.999 | 298.15 | Finke, Messerly, et al., 1972 | T = 12 to 350 K.; DH |
25.50 | 297. | Hall and Baldt, 1971 | DH |
27.0 | 298. | Davis and Wiedeman, 1945 | 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
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
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 351. ± 1. | K | AVG | N/A | Average of 11 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 189.47 | K | N/A | Witschonke, 1954 | Uncertainty assigned by TRC = 0.2 K; TRC |
Tfus | 189.6 | K | N/A | Witschonke, 1954 | Uncertainty assigned by TRC = 0.1 K; TRC |
Tfus | 191. | K | N/A | Timmermans, 1922 | Uncertainty assigned by TRC = 2. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 189.63 | K | N/A | Finke, Messerly, et al., 1972, 2 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.01 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 540. | K | N/A | Wilson, Wilson, et al., 1996 | Uncertainty assigned by TRC = 2. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 45.99 | atm | N/A | Wilson, Wilson, et al., 1996 | Uncertainty assigned by TRC = 0.20 atm; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 7.55 | kcal/mol | A | Stephenson and Malanowski, 1987 | Based on data from 283. to 343. K.; AC |
ΔvapH° | 7.8 | kcal/mol | V | Hall and Baldt, 1971 | ALS |
ΔvapH° | 7.79 | kcal/mol | N/A | Hall and Baldt, 1971 | DRB |
ΔvapH° | 7.8 | kcal/mol | E | Davis and Wiedeman, 1945 | ALS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
8.03 | 272. | A | Stephenson and Malanowski, 1987 | Based on data from 257. to 352. K.; AC |
7.86 | 308. | N/A | Gubkov, Fermor, et al., 1964 | Based on data from 293. to 343. K.; AC |
8.48 | 237. | N/A | Sevrugova, Sokorskii, et al., 1964 | Based on data from 222. to 351. K.; AC |
7.79 | 273. to 353. | N/A | Davis and Wiedeman, 1945 | AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
293. to 343. | 2.69036 | 621.275 | -121.929 | Gubkov, Fermor, et al., 1964, 2 | Coefficents calculated by NIST from author's data. |
222. to 351. | 4.06090 | 1255.939 | -41.853 | Sevrugova, Sokorskii, et al., 1964, 2 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
1.49 | 189.6 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
1.75 | 162.5 | Domalski and Hearing, 1996 | CAL |
7.849 | 189.6 |
Enthalpy of phase transition
ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
0.28401 | 162.5 | crystaline, II | crystaline, I | Finke, Messerly, et al., 1972 | DH |
1.4890 | 189.63 | crystaline, I | liquid | Finke, Messerly, et al., 1972 | DH |
Entropy of phase transition
ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
1.75 | 162.5 | crystaline, II | crystaline, I | Finke, Messerly, et al., 1972 | DH |
7.851 | 189.63 | crystaline, I | liquid | Finke, Messerly, et al., 1972 | DH |
Henry's Law 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 by: Rolf Sander
Henry's Law constant (water solution)
kH(T) = k°H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
k°H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)
k°H (mol/(kg*bar)) | d(ln(kH))/d(1/T) (K) | Method | Reference |
---|---|---|---|
7.2 | X | N/A | |
11. | 2800. | X | N/A |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Ion clustering data, 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
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
View reactions leading to C3H3N+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 10.91 ± 0.01 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 187.5 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 180.1 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
0.006505 | EFD | Suess, Liu, et al., 2003 | Possibly dipole-stabilized anion; G3MP2B3 indicate valence anion is unbound by ca. 0.15 eV; B |
0.006895 | EFD | Desfrancois, Abdoul-Carime, et al., 1994 | EA: 6.9 meV. Dipole-bound state.; B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.91 | PE | Ohno, Matumoto, et al., 1984 | LBLHLM |
10.91 | PE | Kimura, Katsumata, et al., 1981 | LLK |
10.91 | PE | Lake and Thompson, 1970 | RDSH |
10.91 ± 0.01 | PI | Watanabe, Nakayama, et al., 1962 | RDSH |
11.1 | PE | Bieri, Asbrink, et al., 1982 | Vertical value; LBLHLM |
10.92 ± 0.05 | PE | Houk and Munchausen, 1976 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C2H2+ | 13.13 ± 0.10 | HCN | EI | Momigny, Urbain, et al., 1965 | RDSH |
C3HN+ | 16.4 ± 0.1 | ? | EI | Chelobov, Dubov, et al., 1969 | RDSH |
C3H2N+ | 13.82 ± 0.08 | H | EI | Momigny, Urbain, et al., 1965 | RDSH |
C3N+ | 21.6 ± 0.1 | ? | EI | Chelobov, Dubov, et al., 1969 | RDSH |
De-protonation reactions
C3H2N- + =
By formula: C3H2N- + H+ = C3H3N
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 371.1 ± 2.2 | kcal/mol | G+TS | Bartmess, 1980 | gas phase; value altered from reference due to change in acidity scale; B |
ΔrH° | 364.3 ± 4.6 | kcal/mol | EIAE | Heni and Illenberger, 1986 | gas phase; From CH2=CHCN. G3MP2B3 calculations indicate a dHacdi ca. 374 kcal/mol; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 365.3 ± 2.0 | kcal/mol | IMRE | Bartmess, 1980 | gas phase; value altered from reference due to change in acidity scale; B |
Ion clustering data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, 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: Michael M. Meot-Ner (Mautner) and Sharon G. Lias
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
By formula: C3H4N+ + C3H3N = (C3H4N+ • C3H3N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 30.7 | kcal/mol | PHPMS | Meot-Ner (Mautner) and Sieck, 1991 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 29.3 | cal/mol*K | PHPMS | Meot-Ner (Mautner) and Sieck, 1991 | gas phase |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, 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-2179 |
NIST MS number | 228280 |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Baroody and Carpenter, 1972
Baroody, E.E.; Carpenter, G.A.,
Heats of formation of propellant compounds (U), Rpt. Naval Ordnance Systems Command Task No. 331-003/067-1/UR2402-001 for Naval Ordance Station, Indian Head, MD, 1972, 1-9. [all data]
Hall and Baldt, 1971
Hall, H.K., Jr.; Baldt, J.H.,
Thermochemistry of strained-ring bridgehead nitriles and esters,
J. Am. Chem. Soc., 1971, 93, 140-145. [all data]
Davis and Wiedeman, 1945
Davis, H.S.; Wiedeman, O.F.,
Physical properties of acrylonitrile,
Ind. Chim. Belge, 1945, 37, 482-485. [all data]
Finke, Messerly, et al., 1972
Finke, H.L.; Messerly, J.F.; Todd, S.S.,
Thermodynamic properties of acrylonitrile, 1-aminopropane, 2-aminopropane, and 2-methyl-2-aminopropane,
J. Chem. Thermodynam., 1972, 4, 359-374. [all data]
Mirzaliev, Shakhuradov, et al., 1987
Mirzaliev, A.A.; Shakhuradov, Sh.G.; Guseinov, S.O.,
Investigation of the isobaric heat capacity of nitriles at different temperatures, Izv. Vyssh. Ucheb. Zaved.,
Neft i Gaz, 1987, 30(4), 55-58. [all data]
Witschonke, 1954
Witschonke, C.R.,
Freezing point and purity data for some organic compounds,
Anal. Chem., 1954, 26, 562-4. [all data]
Timmermans, 1922
Timmermans, J.,
Investigation of the Freezing Point of Organic Substances VII,
Bull. Soc. Chim. Belg., 1922, 31, 389. [all data]
Finke, Messerly, et al., 1972, 2
Finke, H.L.; Messerly, J.F.; Todd, S.S.,
Thermodynamic properties of acrylonitrile, 1-aminopropane, 2-aminopropane, and 2-methyl-2-aminopropane,
J. Chem. Thermodyn., 1972, 4, 359. [all data]
Wilson, Wilson, et al., 1996
Wilson, L.C.; Wilson, H.L.; Wilding, W.V.; Wilson, G.M.,
Critical Point Measurements for Fourteen Compounds by a Static Method and a Flow Method,
J. Chem. Eng. Data, 1996, 41, 1252-4. [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]
Gubkov, Fermor, et al., 1964
Gubkov, A.N.; Fermor, N.A.; Smirnov, N.I.,
Zh. Prikl. Khim. (S.-Peterburg), 1964, 37, 2204. [all data]
Sevrugova, Sokorskii, et al., 1964
Sevrugova, N.N.; Sokorskii, V.A.; Zhavoronkov, N.M.,
Zh. Prikl. Khim. (Leningrad), 1964, 37, 1989. [all data]
Gubkov, Fermor, et al., 1964, 2
Gubkov, A.N.; Fermor, N.A.; Smirnov, N.I.,
Vapor Pressure of Mono-Poly Systems,
Zh. Prikl. Khim. (Leningrad), 1964, 37, 2204-2210. [all data]
Sevrugova, Sokorskii, et al., 1964, 2
Sevrugova, N.N.; Sokorskii, V.A.; Zhavoronkov, N.M.,
Phase of Equilibrium for Mixtures Acrylonitrile-Acetonitrile,
Zh. Prikl. Khim. (Leningrad), 1964, 37, 9, 1989-1993. [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]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Suess, Liu, et al., 2003
Suess, L.; Liu, Y.; Parthasarathy, R.; Dunning, F.B.,
Dipole-bound negative ions: Collisional destruction and blackbody-radiation-induced photodetachment,
J. Chem. Phys., 2003, 119, 24, 12890-12894, https://doi.org/10.1063/1.1628215
. [all data]
Desfrancois, Abdoul-Carime, et al., 1994
Desfrancois, C.; Abdoul-Carime, H.; Khelifa, N.; Schermann, J.P.,
Fork 1/r to 1/r2 Potentials: Electron Exchange between Rydberg Atoms and Polar Molecules,
Phys. Rev. Lett., 1994, 73, 18, 2436, https://doi.org/10.1103/PhysRevLett.73.2436
. [all data]
Ohno, Matumoto, et al., 1984
Ohno, K.; Matumoto, S.; Imai, K.; Haraa, Y.,
Penning ionization electron spectroscopy of nitriles,
J. Phys. Chem., 1984, 88, 206. [all data]
Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S.,
Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules
in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]
Lake and Thompson, 1970
Lake, R.F.; Thompson, H.,
The photoelectron spectra of some molecules containing the C N group,
Proc. Roy. Soc. (London), 1970, A317, 187. [all data]
Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J.,
Ionization potentials of some molecules,
J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]
Bieri, Asbrink, et al., 1982
Bieri, G.; Asbrink, L.; Von Niessen, W.,
30.4-nm He(II) photoelectron spectra of organic molecules,
J. Electron Spectrosc. Relat. Phenom., 1982, 27, 129. [all data]
Houk and Munchausen, 1976
Houk, K.N.; Munchausen, L.L.,
Ionization potentials, electron affinities, reactivities of cyanoalkenes related electron-deficient alkenes. A frontier molecular orbital treatment of cyanoalkene reactivities in cycloaddition, electrophilic, nucleophilic, and radical reactions.,
J. Am. Chem. Soc., 1976, 98, 937. [all data]
Momigny, Urbain, et al., 1965
Momigny, J.; Urbain, J.; Wankenne, H.,
Les effets de l'impact electronique sur la pyridine et les diazines isomeres,
Bull. Soc. Roy. Sci. Liege, 1965, 34, 337. [all data]
Chelobov, Dubov, et al., 1969
Chelobov, F.N.; Dubov, S.S.; Tikhomirov, M.V.; Dobrovitskii, M.I.; Gitel', P.O.; Rozenshtein, S.M.,
Processes in fluoroacrylonitriles under electron impact,
Zh. Fiz. Khim., 1969, 43, 33, In original 15. [all data]
Bartmess, 1980
Bartmess, J.E.,
Solvent effects on ion-molecule reactions. Vinyl anions vs. conjugate addition,
J. Am. Chem. Soc., 1980, 102, 2483. [all data]
Heni and Illenberger, 1986
Heni, M.; Illenberger, E.,
Electron attachment by saturated nitriles. Acrylonitrile (CH2H3CN), and benzonitrile (C6H5CN),
Int. J. Mass Spectrom. Ion Phys., 1986, 73, 127. [all data]
Meot-Ner (Mautner) and Sieck, 1991
Meot-Ner (Mautner), M.; Sieck, L.W.,
Proton affinity ladders from variable-temperature equilibrium measurements. 1. A reevaluation of the upper proton affinity range,
J. Am. Chem. Soc., 1991, 113, 12, 4448, https://doi.org/10.1021/ja00012a012
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), References
- Symbols used in this document:
AE Appearance energy Cp,liquid Constant pressure heat capacity of liquid EA Electron affinity IE (evaluated) Recommended ionization energy Pc Critical pressure S°liquid Entropy of liquid at standard conditions Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature d(ln(kH))/d(1/T) Temperature dependence parameter for Henry's Law constant k°H Henry's Law constant at 298.15K ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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