Water
- Formula: H2O
- Molecular weight: 18.0153
- IUPAC Standard InChIKey: XLYOFNOQVPJJNP-UHFFFAOYSA-N
- CAS Registry Number: 7732-18-5
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
View 3d structure (requires JavaScript / HTML 5) - Isotopologues:
- Other names: Water vapor; Distilled water; Ice; H2O; Dihydrogen oxide; steam; Tritiotope
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- Information on this page:
- Other data available:
- Gas phase thermochemistry data
- Condensed phase thermochemistry data
- Phase change data
- Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 100, reactions 101 to 150, reactions 151 to 200, reactions 201 to 250, reactions 251 to 300, reactions 301 to 350, reactions 351 to 400, reactions 401 to 450, reactions 451 to 500, reactions 501 to 550, reactions 551 to 600, reactions 601 to 650, reactions 651 to 700, reactions 701 to 750, reactions 751 to 800, reactions 801 to 850, reactions 851 to 900, reactions 901 to 950, reactions 951 to 1000, reactions 1001 to 1050, reactions 1051 to 1100, reactions 1101 to 1150, reactions 1201 to 1250, reactions 1251 to 1300, reactions 1301 to 1350, reactions 1351 to 1360
- Gas phase ion energetics data
- Ion clustering data
- IR Spectrum
- Mass spectrum (electron ionization)
- Vibrational and/or electronic energy levels
- Gas Chromatography
- Fluid Properties
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Reaction 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:
MS - José A. Martinho Simões
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
M - 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. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Reactions 1151 to 1200
C2Ag2 (cr) + 2( • 12.3
) (solution) =
(aq) + 2
(cr)
By formula: C2Ag2 (cr) + 2(HCl • 12.3H2O) (solution) = C2H2 (aq) + 2AgCl (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -77.8 ± 0.6 | kJ/mol | RSC | Finch, Gardner, et al., 1991 | MS |
By formula: H2O + C8H8O2 = C7H6O2 + CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -73.0 ± 1.9 | kJ/mol | Eqk | Guthrie and Cullimore, 1980 | liquid phase; ALS |
By formula: NO2+ + H2O = (NO2+ • H2O)
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
67.4 (+9.6,-0.) | PD/KERD | Graul, Kim, et al., 1992 | gas phase; M |
By formula: (O3- • 2H2O) + H2O = (O3- • 3H2O)
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
19. | 296. | FA | Fehsenfeld and Ferguson, 1974 | gas phase; M |
By formula: C9H7F3O2 + H2O = C9H9F3O3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -28. | kJ/mol | Eqk | Stewart and Van Dyke, 1972 | liquid phase; solvent: Aqueous; ALS |
C11H13ClTi (cr) + ( • 4.40
) (solution) =
(cr) +
(g)
By formula: C11H13ClTi (cr) + (HCl • 4.40H2O) (solution) = C10H10Cl2Ti (cr) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -68.9 ± 3.1 | kJ/mol | RSC | Calhorda, Dias, et al., 1987 | MS |
By formula: (O4S- • H2O) + H2O = (O4S- • 2H2O)
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
6.7 | 296. | FA | Fehsenfeld and Ferguson, 1974 | gas phase; M |
By formula: (O3- • H2O) + H2O = (O3- • 2H2O)
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
26. | 296. | FA | Fehsenfeld and Ferguson, 1974 | gas phase; M |
C2H5LiO (cr) + ( • 552
) (solution) =
(l) +
(cr)
By formula: C2H5LiO (cr) + (HCl • 552H2O) (solution) = C2H6O (l) + ClLi (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -42.4 ± 3.9 | kJ/mol | RSC | Leal and Martinho Simões, 1993 | MS |
C6H5NaO (cr) + ( • 552
) (solution) =
(cr) +
(cr)
By formula: C6H5NaO (cr) + (HCl • 552H2O) (solution) = C6H6O (cr) + ClNa (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -78.0 ± 5.7 | kJ/mol | RSC | Leal, Pires de Matos, et al., 1991 | MS |
By formula: H2O + C8H18O2 = C6H12O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 33.34 ± 0.15 | kJ/mol | Eqk | Wiberg and Squires, 1981 | liquid phase; ALS |
By formula: C6H14O4 + H2O = C4H8O3 + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -52.43 ± 0.50 | kJ/mol | Eqk | Guthrie and Cullimore, 1980 | liquid phase; ALS |
By formula: C6H12O2 + H2O = C4H6O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 15.3 ± 0.2 | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | liquid phase; ALS |
C9H16O2 + =
+ 2
By formula: C9H16O2 + H2O = C7H10O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 45. ± 2. | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | liquid phase; ALS |
By formula: C7H16O2 + H2O = C5H10O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 33.16 ± 0.079 | kJ/mol | Eqk | Wiberg and Squires, 1981 | liquid phase; ALS |
By formula: C7H16O2 + H2O = C5H10O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 34.90 ± 0.096 | kJ/mol | Eqk | Wiberg and Squires, 1981 | liquid phase; ALS |
(cr) + (
• 552
) (solution) =
(l) +
(cr)
By formula: CH3NaO (cr) + (HCl • 552H2O) (solution) = CH4O (l) + ClNa (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -108.0 ± 3.1 | kJ/mol | RSC | Leal, Pires de Matos, et al., 1991 | MS |
C3H9BrSn (cr) + (l) = (
• 55
) (solution) + C3H10OSn (cr)
By formula: C3H9BrSn (cr) + H2O (l) = (HBr • 55H2O) (solution) + C3H10OSn (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -10.0 ± 0.8 | kJ/mol | RSC | Baldwin, Lappert, et al., 1972 | MS |
By formula: (Ca+ • 2H2O) + H2O = (Ca+ • 3H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 90.0 | kJ/mol | HPMS | Kochanski and Constantin, 1987 | gas phase; M |
By formula: (Ca+ • 3H2O) + H2O = (Ca+ • 4H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 78.2 | kJ/mol | HPMS | Kochanski and Constantin, 1987 | gas phase; M |
By formula: (Ca+ • 4H2O) + H2O = (Ca+ • 5H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 73.2 | kJ/mol | HPMS | Kochanski and Constantin, 1987 | gas phase; M |
By formula: C6H12O2 + H2O = C4H6O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 25.4 ± 0.3 | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | liquid phase; ALS |
By formula: C5H12O2 + H2O = C3H6O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 37.65 ± 0.071 | kJ/mol | Eqk | Wiberg and Squires, 1981 | liquid phase; ALS |
By formula: C6H14O2 + H2O = 2CH4O + C4H8O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 36.39 ± 0.067 | kJ/mol | Eqk | Wiberg and Squires, 1981 | liquid phase; ALS |
By formula: C7H16O2 + H2O = 2CH4O + C5H10O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 34.03 ± 0.14 | kJ/mol | Eqk | Wiberg and Squires, 1981 | liquid phase; ALS |
By formula: C6H11NO3 + H2O = C4H5NO2 + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -25.7 ± 1.5 | kJ/mol | Eqk | Guthrie and Cullimore, 1980 | liquid phase; ALS |
By formula: C3Cl3N3 + 3H2O = C3H3N3O3 + 3HCl
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -399.1 ± 0.2 | kJ/mol | Cm | Humphries and Nicholson, 1957 | solid phase; ALS |
(cr) +
(l) = C3H10OSn (cr) + (
• 55
) (solution)
By formula: C3H9ClSn (cr) + H2O (l) = C3H10OSn (cr) + (HCl • 55H2O) (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -13.8 ± 0.4 | kJ/mol | RSC | Baldwin, Lappert, et al., 1972 | MS |
C3H9ISn (l) + (l) = (
• 55
) (solution) + C3H10OSn (cr)
By formula: C3H9ISn (l) + H2O (l) = (HI • 55H2O) (solution) + C3H10OSn (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -17.6 ± 0.4 | kJ/mol | RSC | Baldwin, Lappert, et al., 1972 | MS |
+ 2
= C9H16O2 +
By formula: C7H10O + 2CH4O = C9H16O2 + H2O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -69. ± 3. | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | gas phase; ALS |
By formula: C4H8O3 + H2O = C3H6O3 + CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -65.6 ± 5.9 | kJ/mol | Eqk | Guthrie and Cullimore, 1980 | liquid phase; ALS |
By formula: C8H18O2 + H2O = C6H12O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 13.74 ± 0.054 | kJ/mol | Cm | Wiberg and Squires, 1979 | liquid phase; ALS |
By formula: H2O + C3H6O2 = C2H4O2 + CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.39 | kJ/mol | Cm | Coon and Daniels, 1933 | liquid phase; solvent: in HCl; ALS |
By formula: C2H6O + C2H4O2 = C4H8O2 + H2O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 16.6 ± 0.3 | kJ/mol | Eqk | Halford and Brundage, 1942 | gas phase; At 313 K; ALS |
By formula: C5H12O3 + H2O = C3H6O2 + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -26.3 ± 2.7 | kJ/mol | Cm | Hine and Klueppet, 1974 | liquid phase; ALS |
By formula: H2O + C7H12O = C6H10O + CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -13.63 ± 0.69 | kJ/mol | Eqk | Hine and Arata, 1976 | liquid phase; ALS |
By formula: C4H8S+ + H2O = (C4H8S+ • H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 42. | kJ/mol | PHPMS | Hiraoka, Takimoto, et al., 1987 | gas phase; ΔrH<; M |
By formula: C4H6O + 2CH4O = C6H12O2 + H2O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -52.7 ± 1.7 | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | gas phase; ALS |
By formula: H2O + C8H16O2 = C6H10O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 28.9 ± 0.1 | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | liquid phase; ALS |
By formula: C4H10O3 + H2O = C2H4O2 + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -9.6 ± 1.2 | kJ/mol | Cm | Hine and Klueppet, 1974 | liquid phase; ALS |
By formula: C3H2F6O2 = C3F6O + H2O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 85.4 ± 0.8 | kJ/mol | Cm | Rogers and Rapiejko, 1971 | solid phase; Hydration; ALS |
By formula: C4H4O2 + H2O = C4H6O3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -118.5 | kJ/mol | Kin | Lopatin, Popov, et al., 1992 | liquid phase; solvent: Solution; ALS |
By formula: C4H8O + H2O = CH4O + C3H6O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -24.04 ± 0.46 | kJ/mol | Eqk | Hine and Arata, 1976 | liquid phase; ALS |
By formula: H2O+ + H2O = (H2O+ • H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 150. | kJ/mol | PI | Ng, Trevor, et al., 1977 | gas phase; ΔrH>; M |
By formula: (Ca+ • H2O) + H2O = (Ca+ • 2H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 100. | kJ/mol | HPMS | Kochanski and Constantin, 1987 | gas phase; M |
By formula: C4H10O2 + H2O = 2CH4O + C2H4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 35.9 ± 0.8 | kJ/mol | Eqk | Wiberg, Morgan, et al., 1994 | liquid phase; ALS |
By formula: H2O + C7H14O2 = C5H8O + 2CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 16. ± 2. | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | liquid phase; ALS |
By formula: C4H5NO2 + H2O = C3H3NO2 + CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -54. ± 2. | kJ/mol | Eqk | Guthrie and Cullimore, 1980 | liquid phase; ALS |
By formula: C10H14O3 + H2O = 2CH4O + C8H8O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -17.3 ± 0.4 | kJ/mol | Eqk | Guthrie and Cullimore, 1980 | liquid phase; ALS |
By formula: C4H8O2 + H2O = CH4O + C3H6O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -60.17 ± 0.92 | kJ/mol | Eqk | Guthrie and Cullimore, 1980 | liquid phase; ALS |
References
Go To: Top, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Finch, Gardner, et al., 1991
Finch, A.; Gardner, P.J.; Head, A.J.; Majdi, H.S.,
Thermochim. Acta, 1991, 180, 325. [all data]
Guthrie and Cullimore, 1980
Guthrie, J.P.; Cullimore, P.A.,
Effect of the acyl substituent on the equilibrium constant for hydration of esters,
Can. J. Chem., 1980, 58, 1281-1294. [all data]
Graul, Kim, et al., 1992
Graul, S.T.; Kim, H.S.; Bowers, M.T.,
The Dynamics of Photodissociation of the Gas Phase (N2O.H2O)+ Cluster Ion,
Int. J. Mass Spectrom. Ion Proc., 1992, 117, 507, https://doi.org/10.1016/0168-1176(92)80111-D
. [all data]
Fehsenfeld and Ferguson, 1974
Fehsenfeld, F.C.; Ferguson, E.E.,
Laboratory studies of negative ion reactions with atmospheric trace constituents,
J. Chem. Phys., 1974, 61, 3181. [all data]
Stewart and Van Dyke, 1972
Stewart, R.; Van Dyke, J.D.,
The Hydration of ketones in mixtures of water and polar aprotic solvents,
Can. J. Chem., 1972, 50, 1992-1999. [all data]
Calhorda, Dias, et al., 1987
Calhorda, M.J.; Dias, A.R.; Minas da Piedade M.E.; Salema, M.S.; Martinho Simões J.A.,
Organometallics, 1987, 6, 734. [all data]
Leal and Martinho Simões, 1993
Leal, J.P.; Martinho Simões, J.A.,
J. Organometal. Chem., 1993, 460, 131. [all data]
Leal, Pires de Matos, et al., 1991
Leal, J.P.; Pires de Matos, A.; Martinho Simões, J.A.,
J. Organometal. Chem., 1991, 403, 1. [all data]
Wiberg and Squires, 1981
Wiberg, K.B.; Squires, R.R.,
Thermochemical studies of carbonyl reactions. 2. Steric effects in acetal and ketal hydrolysis,
J. Am. Chem. Soc., 1981, 103, 4473-4478. [all data]
Wiberg, Morgan, et al., 1994
Wiberg, K.B.; Morgan, K.M.; Maltz, H.,
Thermochemistry of carbonyl reactions. 6. A study of hydration equilibria,
J. Am. Chem. Soc., 1994, 116, 11067-11077. [all data]
Baldwin, Lappert, et al., 1972
Baldwin, J.C.; Lappert, M.F.; Pedley, J.B.; Poland, J.S.,
J. Chem. Soc., Dalton Trans., 1972, 1943.. [all data]
Kochanski and Constantin, 1987
Kochanski, E.; Constantin, E.,
Theoretical and Experimental Studies of the System Ca+(H2O)n for n=1 to 10,
J. Chem. Phys., 1987, 87, 3, 1661, https://doi.org/10.1063/1.453229
. [all data]
Humphries and Nicholson, 1957
Humphries, A.R.; Nicholson, G.R.,
472. The heat of formation of cyanuric chloride and the heat of trimerisation of cyanogen chloride,
J. Chem. Phys., 1957, 2429-2431. [all data]
Wiberg and Squires, 1979
Wiberg, K.B.; Squires, R.R.,
Thermodynamics of hydrolysis aliphatic ketals. An entropy component of steric effects,
J. Am. Chem. Soc., 1979, 101, 5512-5515. [all data]
Coon and Daniels, 1933
Coon, E.D.; Daniels, F.,
An isothermal calorimeter for slow reactions,
J. Phys. Chem., 1933, 37, 1-12. [all data]
Halford and Brundage, 1942
Halford, J.O.; Brundage, D.,
The vapor phase esterification equilibrium,
J. Am. Chem. Soc., 1942, 64, 36-40. [all data]
Hine and Klueppet, 1974
Hine, J.; Klueppet, A.W.,
Structural effects on rates and equilibria. XVIII. Thermodynamic stability of ortho esters,
J. Am. Chem. Soc., 1974, 96, 2924-2929. [all data]
Hine and Arata, 1976
Hine, J.; Arata, K.,
Keto-Enol tautomerism. II. The calorimetrical determination of the equilibrium constants for keto-enol tautomerism for cyclohexanone,
Bull. Chem. Soc. Jpn., 1976, 49, 3089-3092. [all data]
Hiraoka, Takimoto, et al., 1987
Hiraoka, K.; Takimoto, H.; Yamabe, S.,
Stabilities and Structures in Cluster Ions of Five-Membered Heterocyclic Compounds Containing O, N and S Atoms,
J. Am. Chem. Soc., 1987, 109, 24, 7346, https://doi.org/10.1021/ja00258a018
. [all data]
Rogers and Rapiejko, 1971
Rogers, F.E.; Rapiejko, R.J.,
Thermochemistry of carbonyl addition reactions. I. Addition of water and methanol to hexafluoroacetone,
J. Am. Chem. Soc., 1971, 93, 4596-1597. [all data]
Lopatin, Popov, et al., 1992
Lopatin, E.B.; Popov, V.V.; Epshtein, N.A.; Mikhaleva, L.M.; Makarov, Yu.N.,
Kinetic and thermochemical characteristics of diketene-based reactions,
Khim.-Farm. Zh., 1992, 26, 76-78. [all data]
Ng, Trevor, et al., 1977
Ng, C.Y.; Trevor, D.J.; Tiedemann, P.W.; Ceyer, S.T.; Kronebush, B.H.; Mahan, B.H.; Lee, Y.T.,
Photoinization of Dimeric Polyatomic Molecules: Proton Affinities of H2O and HF,
J. Chem. Phys., 1977, 67, 9, 4235, https://doi.org/10.1063/1.435404
. [all data]
Notes
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
T Temperature ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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