1,2-Ethanediol
- Formula: C2H6O2
- Molecular weight: 62.0678
- IUPAC Standard InChIKey: LYCAIKOWRPUZTN-UHFFFAOYSA-N
- CAS Registry Number: 107-21-1
- 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. - Species with the same structure:
- Other names: Ethylene glycol; Ethylene alcohol; Glycol; Glycol alcohol; Lutrol 9; Macrogol 400 BPC; Monoethylene glycol; Ramp; Tescol; 1,2-Dihydroxyethane; 2-Hydroxyethanol; HOCH2CH2OH; Aethylenglykol; Ethane-1,2-diol; Fridex; MEG 100; 1,2-Ethandiol; Ucar 17; Dowtherm SR 1; Norkool; Zerex; Ilexan E; 1,2-Ethylene glycol; 146AR; Ethylene dihydrate; NSC 93876; Union Carbide XL 54 Type I De-icing Fluid; Dihydroxyethane; Ethanediol; Ethylene gycol; Glygen; Athylenglykol; M.e.g.; Aliphatic diol
- Information on this page:
- Other data available:
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Gas phase thermochemistry data
Go To: Top, Phase change data, Henry's Law data, Gas phase ion energetics 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -394.4 ± 2.8 | kJ/mol | Ccr | Knauth and Sabbah, 1990 | see Knauth and Sabbah, 1989; ALS |
ΔfH°gas | -388. ± 2. | kJ/mol | Ccb | Gardner and Hussain, 1972 | ALS |
ΔfH°gas | -390.3 | kJ/mol | N/A | McClaine, 1947 | Value computed using ΔfHliquid° value of -455.9 kj/mol from McClaine, 1947 and ΔvapH° value of 65.6 kj/mol from Knauth and Sabbah, 1990.; DRB |
ΔfH°gas | -389.3 | kJ/mol | N/A | Parks, West, et al., 1946 | Value computed using ΔfHliquid° value of -454.9±0.3 kj/mol from Parks, West, et al., 1946 and ΔvapH° value of 65.6 kj/mol from Knauth and Sabbah, 1990.; DRB |
ΔfH°gas | -387.5 | kJ/mol | N/A | Moureu and Dode, 1937 | Value computed using ΔfHliquid° value of -453.1±1.2 kj/mol from Moureu and Dode, 1937 and ΔvapH° value of 65.6 kj/mol from Knauth and Sabbah, 1990.; DRB |
Quantity | Value | Units | Method | Reference | Comment |
S°gas | 311.84 | J/mol*K | N/A | Chao J., 1986 | Other third-law entropy values at 298.15 K known from literature are 284.5 [ Buckley P., 1967], 312.5 [ Stull D.R., 1969], and 315.47(5.36) J/mol*K [ Yeh T.-S., 1994].; GT |
Constant pressure heat capacity of gas
Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
59.79 | 200. | Yeh T.-S., 1994 | Other statistically calculated values of entropy at 298.15 K (274.76 [ Buckley P., 1967], 293.76 [ Frei H., 1977], 303.8 [ Chao J., 1986], and 323.55 J/mol*K [ Dyatkina M.E., 1954]) are in worse agreement with third-law entropy value.; GT |
77.99 | 298.15 | ||
78.41 | 300. | ||
97.99 | 400. | ||
113.64 | 500. | ||
125.65 | 600. | ||
135.23 | 700. | ||
143.26 | 800. | ||
150.25 | 900. | ||
156.40 | 1000. |
Phase change data
Go To: Top, Gas phase thermochemistry data, Henry's Law data, Gas phase ion energetics 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 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.
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 |
---|---|---|---|---|---|
Tboil | 470.5 ± 0.5 | K | AVG | N/A | Average of 27 out of 31 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 261. ± 2. | K | AVG | N/A | Average of 8 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 256.6 | K | N/A | Knauth and Sabbah, 1990, 2 | Uncertainty assigned by TRC = 0.2 K; TRC |
Ttriple | 260.6 | K | N/A | Wilhoit, Chao, et al., 1985 | Uncertainty assigned by TRC = 0.2 K; TRC |
Ttriple | 260.6 | K | N/A | Nikolaev and Rabinovich, 1967 | Uncertainty assigned by TRC = 0.2 K; TRC |
Ttriple | 260.8 | K | N/A | Parks and Kelley, 1925 | Uncertainty assigned by TRC = 0.3 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 720. | K | N/A | Nikitin, Pavlov, et al., 1993 | Uncertainty assigned by TRC = 4. K; TRC |
Tc | 720. | K | N/A | Teja and Rosenthal, 1991 | Uncertainty assigned by TRC = 1. K; TRC |
Tc | 718. | K | N/A | Teja and Anselme, 1990 | Uncertainty assigned by TRC = 1. K; TRC |
Tc | 645. | K | N/A | Stephens and Tamplin, 1979 | Uncertainty assigned by TRC = 30. K; TC data from Union Carbide Corp.; TRC |
Tc | 790. | K | N/A | Artemchenko, 1972 | Uncertainty assigned by TRC = 30. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 82.00 | bar | N/A | Nikitin, Pavlov, et al., 1993 | Uncertainty assigned by TRC = 2.00 bar; TRC |
Pc | 90.00 | bar | N/A | Teja and Rosenthal, 1991 | Uncertainty assigned by TRC = 1.00 bar; TRC |
Pc | 131.00 | bar | N/A | Lyons, 1985 | Uncertainty assigned by TRC = 10.00 bar; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 65. ± 3. | kJ/mol | AVG | N/A | Average of 13 values; Individual data points |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
62.4 ± 4.0 | 345. | N/A | Petitjean, Reyes-Perez, et al., 2010 | Based on data from 307. to 384. K.; AC |
57.4 | 385. | TGA | Al-Najjar and Al-Sammerrai, 2007 | Based on data from 363. to 408. K.; AC |
65.2 | 338. | A | Stephenson and Malanowski, 1987 | Based on data from 323. to 473. K.; AC |
62.5 | 378. | A | Stephenson and Malanowski, 1987 | Based on data from 363. to 418. K.; AC |
68. ± 2. | 409. | V | Gardner and Hussain, 1972 | ALS |
64.0 | 338. | N/A | Jones and Tamplin, 1952 | Based on data from 323. to 473. K. See also Gardner and Hussain, 1972.; AC |
61.9 ± 6.3 | 273. | V | Gallaugher and Hibbert, 1937 | Reanalyzed by Pedley, Naylor, et al., 1986, Original value = 57.07 kJ/mol; ALS |
61.1 | 383. | N/A | Schierholtz and Staples, 1935 | Based on data from 363. to 403. K.; AC |
57.3 | 436. | N/A | Schierholtz and Staples, 1935 | Based on data from 403. to 470. K.; AC |
61.1 | 410. | N/A | de Forcrand, 1901 | Based on data from 395. to 459. K.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
View plot Requires a JavaScript / HTML 5 canvas capable browser.
Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
323. to 473. | 4.97012 | 1914.951 | -84.996 | Jones and Tamplin, 1952, 2 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
9.958 | 260.6 | Nikolaev and Rabinovich, 1967, 2 | DH |
11.623 | 260.8 | Parks and Kelley, 1925, 2 | DH |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
38.21 | 260.6 | Nikolaev and Rabinovich, 1967, 2 | DH |
44.57 | 260.8 | Parks and Kelley, 1925, 2 | DH |
Henry's Law data
Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics 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: 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 | Comment |
---|---|---|---|---|
4.0×10+6 | M | N/A | Value at T = 293. K. | |
17000. | M | N/A | missing citation say that this value is unreliable. |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, 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
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
View reactions leading to C2H6O2+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 815.9 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 773.6 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.16 | EI | Holmes and Lossing, 1982 | LBLHLM |
10.55 | PE | Ohno, Imai, et al., 1985 | Vertical value; LBLHLM |
10.55 | PE | Kimura, Katsumata, et al., 1981 | Vertical value; LLK |
10.5 | PE | Von Niessen, Bieri, et al., 1980 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH3O+ | 11.12 ± 0.05 | CH2OH | EI | Holmes and Lossing, 1984 | LBLHLM |
CH3O+ | 12.5 ± 0.15 | CH2O+H | EI | Holmes, Lossing, et al., 1983 | LBLHLM |
CH4O+[CH2OH2+] | 11.42 ± 0.05 | CH2O | EI | Holmes, Lossing, et al., 1982 | LBLHLM |
CH5O+[CH3OH2+] | 10.7 ± 0.1 | CHO | EI | Burgers, Holmes, et al., 1987 | LBLHLM |
De-protonation reactions
C2H5O2- + =
By formula: C2H5O2- + H+ = C2H6O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1528. ± 10. | kJ/mol | G+TS | Crowder and Bartmess, 1993 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1510. ± 8.4 | kJ/mol | IMRE | Crowder and Bartmess, 1993 | gas phase; B |
References
Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Knauth and Sabbah, 1990
Knauth, P.; Sabbah, R.,
Energetics of intra- and intermolecular bonds in ω-alkanediols (II) Thermochemical study of 1,2-ethanediol, 1,3-propanediol, 1,4-butanediol, and 1,5-pentanediol at 298.15K,
Struct. Chem., 1990, 1, 43-46. [all data]
Knauth and Sabbah, 1989
Knauth, P.; Sabbah, R.,
Combustion calorimetry on milligram samples of liquid substances with a CRMT rocking bomb calorimeter. Application to the study of ω-alkanediol at 298.15 K,
J. Chem. Thermodyn., 1989, 21, 203-210. [all data]
Gardner and Hussain, 1972
Gardner, P.J.; Hussain, K.S.,
The standard enthalpies of formation of some aliphatic diols,
J. Chem. Thermodyn., 1972, 4, 819-827. [all data]
McClaine, 1947
McClaine, L.A.,
Thermodynamic data for some compounds containing carbon, hydrogen and oxygen, Ph.D. Thesis for Stanford University, 1947, 1-57. [all data]
Parks, West, et al., 1946
Parks, G.S.; West, T.J.; Naylor, B.F.; Fujii, P.S.; McClaine, L.A.,
Thermal data on organic compounds. XXIII. Modern combustion data for fourteen hydrocarbons and five polyhydroxy alcohols,
J. Am. Chem. Soc., 1946, 68, 2524-2527. [all data]
Moureu and Dode, 1937
Moureu, H.; Dode, M.,
Chaleurs de formation de l'oxyde d'ethylene, de l'ethanediol et de quelques homologues,
Bull. Soc. Chim. France, 1937, 4, 637-647. [all data]
Chao J., 1986
Chao J.,
Thermodynamic properties of key organic oxygen compounds in the carbon range C1 to C4. Part 2. Ideal gas properties,
J. Phys. Chem. Ref. Data, 1986, 15, 1369-1436. [all data]
Buckley P., 1967
Buckley P.,
Infrared studies on rotational isomerism. I. Ethylene glycol,
Can. J. Chem., 1967, 45, 397-407. [all data]
Stull D.R., 1969
Stull D.R., Jr.,
The Chemical Thermodynamics of Organic Compounds. Wiley, New York, 1969. [all data]
Yeh T.-S., 1994
Yeh T.-S.,
Global conformational analysis of 1,2-ethanediol,
J. Phys. Chem., 1994, 98, 8921-8929. [all data]
Frei H., 1977
Frei H.,
Ethylene glycol: infrared spectra, ab initio calculation, vibrational analysis and conformations of 5 matrix isolated isotopic modifications,
Chem. Phys., 1977, 25, 271-298. [all data]
Dyatkina M.E., 1954
Dyatkina M.E.,
Thermodynamic functions of normal alcohols (propanol, butanol, ethylene glycol),
Zh. Fiz. Khim., 1954, 28, 377. [all data]
Knauth and Sabbah, 1990, 2
Knauth, P.; Sabbah, R.,
Can. J. Chem., 1990, 68, 731. [all data]
Wilhoit, Chao, et al., 1985
Wilhoit, R.C.; Chao, J.; Hall, K.R.,
Thermodynamic Properties of Key Organic Compounds in the Carbon Range C1 to C4. Part 1. Properties of Condensed Phases,
J. Phys. Chem. Ref. Data, 1985, 14, 1. [all data]
Nikolaev and Rabinovich, 1967
Nikolaev, P.N.; Rabinovich, I.B.,
Zh. Fiz. Khim., 1967, 41, 9, 2191. [all data]
Parks and Kelley, 1925
Parks, G.S.; Kelley, K.K.,
Thermal Data on Organic Compounds II. The Heat Capacities of Five Organic Compounds. The Entropies and Free Energies of Some Homologous Series of Aliphatic Compounds,
J. Am. Chem. Soc., 1925, 47, 2089-97. [all data]
Nikitin, Pavlov, et al., 1993
Nikitin, E.D.; Pavlov, P.A.; Skripov, P.V.,
Measurement of the critical properties of thermally unstable substances and mixtures by the pulse-heating method,
J. Chem. Thermodyn., 1993, 25, 869-80. [all data]
Teja and Rosenthal, 1991
Teja, A.S.; Rosenthal, D.J.,
The critical pressures and temperatures of ten substances using a low residence time flow apparatus
in Experimental Results for Phase Equilibria and Pure Component Properties, DIPPR DATA Series No. 1, 1991. [all data]
Teja and Anselme, 1990
Teja, A.S.; Anselme, M.J.,
The critical properties of thermally stable and unstable fluids. I. 1985 results,
AIChE Symp. Ser., 1990, 86, 279, 115-21. [all data]
Stephens and Tamplin, 1979
Stephens, M.A.; Tamplin, W.S.,
Saturated Liquid SPecific Heats of Ethylene GLycol Homologues,
J. Chem. Eng. Data, 1979, 24, 81-2. [all data]
Artemchenko, 1972
Artemchenko, A.I.,
Fiz. Khim. Rastvorov, 1972, 1972, 128-34. [all data]
Lyons, 1985
Lyons, R.L.,
The determination of critical properties and vapor pressure of thermally stable and unstable compounds, M. S. Thesis, 1985. [all data]
Petitjean, Reyes-Perez, et al., 2010
Petitjean, M.; Reyes-Perez, E.; Perez, D.; Mirabel, Ph.; Le Calve, S.,
Vapor Pressure Measurements of Hydroxyacetaldehyde and Hydroxyacetone in the Temperature Range (273 to 356) K,
J. Chem. Eng. Data, 2010, 55, 2, 852-855, https://doi.org/10.1021/je9004905
. [all data]
Al-Najjar and Al-Sammerrai, 2007
Al-Najjar, Hazim; Al-Sammerrai, Dhoaib,
Thermogravimetric determination of the heat of vaporization of some highly polar solvents,
J. Chem. Technol. Biotechnol., 2007, 37, 3, 145-152, https://doi.org/10.1002/jctb.280370302
. [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]
Jones and Tamplin, 1952
Jones, W.S.; Tamplin, W.S.,
Chapter 9. Physical Properties of Propylene Glycol
in Glycols. American Chemical Society Monograph 114, G.O. Curme, Jr., ed(s)., Reinhold, New York, 1952, 210-240. [all data]
Gallaugher and Hibbert, 1937
Gallaugher, A.F.; Hibbert, H.,
Studies on reactions relating to carbohydrates and polysaccharides. LV. Vapor pressures of the polyethylene glycols and their derivatives,
J. Am. Chem. Soc., 1937, 59, 2521-2525. [all data]
Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P.,
Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]
Schierholtz and Staples, 1935
Schierholtz, O.J.; Staples, M.L.,
Vapor Pressures of Certain Glycols,
J. Am. Chem. Soc., 1935, 57, 12, 2709-2711, https://doi.org/10.1021/ja01315a106
. [all data]
de Forcrand, 1901
de Forcrand, M.,
Compt. Rend., 1901, 132, 688. [all data]
Jones and Tamplin, 1952, 2
Jones, W.S.; Tamplin, W.S.,
Chapter 3. Physical Properties of Ethylene Glycol
in Glycols, George O. Curme, Jr., ed(s)., Reinhold Publishing Corporation, 330 West Forty-Second Street, New York, U.S.A., 1952, 27-62. [all data]
Nikolaev and Rabinovich, 1967, 2
Nikolaev, P.N.; Rabinovich, I.B.,
Heat capacity of ethylene glycol and ethylene deuteroglycol in the temperature range 80-300K,
Zhur. Fiz. Khim., 1967, 41, 2191-2194. [all data]
Parks and Kelley, 1925, 2
Parks, G.S.; Kelley, K.K.,
Thermal data on organic compounds. II. The heat capacities of five organic compounds. The entropies and free energies of some homologous series of aliphatic compounds,
J. Am. Chem. Soc., 1925, 47, 2089-2097. [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]
Holmes and Lossing, 1982
Holmes, J.L.; Lossing, F.P.,
Towards a general scheme for estimating the heats of formation of organic ions in the gas phase. Part II. The effect of substitution at charge-bearing sites,
Can. J. Chem., 1982, 60, 2365. [all data]
Ohno, Imai, et al., 1985
Ohno, K.; Imai, K.; Harada, Y.,
Variations in reactivity of lone-pair electrons due to intramolecular hydrogen bonding as observed by penning ionization electron spectroscopy,
J. Am. Chem. Soc., 1985, 107, 8078. [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]
Von Niessen, Bieri, et al., 1980
Von Niessen, W.; Bieri, G.; Asbrink, L.,
30.4 nm He(II) photoelectron spectra of organic molecules. Part III. Oxo-compounds (C,H,O),
J. Electron Spectrosc. Relat. Phenom., 1980, 21, 175. [all data]
Holmes and Lossing, 1984
Holmes, J.L.; Lossing, F.P.,
Heats of formation of organic radicals from appearance energies,
Int. J. Mass Spectrom. Ion Processes, 1984, 58, 113. [all data]
Holmes, Lossing, et al., 1983
Holmes, J.L.; Lossing, F.P.; Terlouw, J.K.; Burgers, P.C.,
Novel gas-phase ions. The radical cations [CH2XH]+. (X = F, Cl, Br, I, OH, NH2, SH) and [CH2CH2NH3]+.,
Can. J. Chem., 1983, 61, 2305. [all data]
Holmes, Lossing, et al., 1982
Holmes, J.L.; Lossing, F.P.; Terlouw, J.K.; Burgers, P.C.,
The radical cation [CH2OH2]+ and related stable gas phase ion-dipole complexes,
J. Am. Chem. Soc., 1982, 104, 2931. [all data]
Burgers, Holmes, et al., 1987
Burgers, P.C.; Holmes, J.L.; Hop, C.E.C.A.; Postma, R.; Ruttink, P.J.A.; Terlouw, J.K.,
The isomeric [C2H6O2]+ hydrogen-bridged radical cations [CH2-O(H)...H...O=CH2]+, [CH3-O...H...O=CH2]+, and [CH3-O(H)...H...O=CH]+: Theory and experiment,
J. Am. Chem. Soc., 1987, 109, 7315. [all data]
Crowder and Bartmess, 1993
Crowder, C.; Bartmess, J.,
The Gas Phase Acidities of Diols,
J. Am. Soc. Mass Spectrom., 1993, 4, 9, 723, https://doi.org/10.1016/1044-0305(93)80051-Y
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy Cp,gas Constant pressure heat capacity of gas Pc Critical pressure S°gas Entropy of gas 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 ΔfH°gas Enthalpy of formation of gas 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 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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