Enthalpy Of Formation For Water
Water
- Formula: HiiO
- Molecular weight: 18.0153
-
IUPAC Standard InChI: InChI=1S/H2O/h1H2
- IUPAC Standard InChIKey: XLYOFNOQVPJJNP-UHFFFAOYSA-N
- CAS Registry Number: 7732-18-5
- Chemical structure:
This structure is likewise available as a 2d Mol file or every bit a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Isotopologues:
- Deuterium oxide
- H2o-t
- Water-xviiiO
- Water-d
- Water-t2
- Deuterium oxide
- Other names: Water vapor; Distilled water; Ice; H2O; Dihydrogen oxide; steam; Tritiotope
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- Information on this page:
- Condensed phase thermochemistry information
- References
- Notes
- Other information bachelor:
- Gas phase thermochemistry data
- Phase alter data
- Reaction thermochemistry data: reactions one 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 grand, reactions 1001 to 1050, reactions 1051 to 1100, reactions 1101 to 1150, reactions 1151 to 1200, reactions 1201 to 1250, reactions 1251 to 1300, reactions 1301 to 1350, reactions 1351 to 1360
- Gas stage ion energetics information
- Ion clustering data
- IR Spectrum
- Mass spectrum (electron ionization)
- Vibrational and/or electronic energy levels
- Gas Chromatography
- Fluid Backdrop
- Data at other public NIST sites:
- Microwave spectra (on physics lab spider web site)
- Electron-Bear on Ionization Cantankerous Sections (on physics web site)
- Computational Chemical science Comparison and Benchmark Database
- Gas Phase Kinetics Database
- Reference simulation: SPC/E Water
- X-ray Photoelectron Spectroscopy Database, version 4.1
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Condensed phase thermochemistry data
Go To: Top, References, Notes
Data compilation copyright by the U.South. Secretarial assistant of Commerce on behalf of the UsaA. All rights reserved.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°liquid | -285.830 ± 0.040 | kJ/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
ΔfH°liquid | -285.83 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1979 |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 69.95 ± 0.03 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid,1 bar | 69.95 | J/mol*K | Review | Hunt, 1998 | Data last reviewed in March, 1979 |
Liquid Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*tiii + East/t2
H° − H°298.fifteen= A*t + B*t2/2 + C*tiii/three + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/ii + D*tiii/3 − East/(2*t2) + G
Cp = heat capacity (J/mol*One thousand)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (One thousand) / thousand.
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Temperature (K) | 298. - 500. |
---|---|
A | -203.6060 |
B | 1523.290 |
C | -3196.413 |
D | 2474.455 |
E | three.855326 |
F | -256.5478 |
G | -488.7163 |
H | -285.8304 |
Reference | Chase, 1998 |
Comment | Information last reviewed in March, 1979 |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Information compilation copyright past the U.South. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Central Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]
Chase, 1998
Chase, M.Westward., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Information, Monograph nine, 1998, one-1951. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
S°liquid Entropy of liquid at standard conditions S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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Enthalpy Of Formation For Water,
Source: https://webbook.nist.gov/cgi/cbook.cgi?ID=C7732185&Mask=2
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