Heat Of Formation For Water
Water
- Formula: H2O
- Molecular weight: eighteen.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 also available as a 2nd Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Isotopologues:
- Deuterium oxide
- Water-t
- Water-xviiiO
- H2o-d
- H2o-ttwo
- Deuterium oxide
- Other names: Water vapor; Distilled h2o; Water ice; H2O; Dihydrogen oxide; steam; Tritiotope
- Permanent link for this species. Utilize this link for bookmarking this species for time to come reference.
- Information on this page:
- Condensed phase thermochemistry data
- References
- Notes
- Other data bachelor:
- Gas stage thermochemistry information
- Phase change data
- Reaction thermochemistry information: reactions one to l, 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 1151 to 1200, reactions 1201 to 1250, reactions 1251 to 1300, reactions 1301 to 1350, reactions 1351 to 1360
- Gas phase ion energetics data
- Ion clustering information
- IR Spectrum
- Mass spectrum (electron ionization)
- Vibrational and/or electronic energy levels
- Gas Chromatography
- Fluid Properties
- Data at other public NIST sites:
- Microwave spectra (on physics lab spider web site)
- Electron-Impact Ionization Cantankerous Sections (on physics web site)
- Computational Chemical science Comparing and Benchmark Database
- Gas Phase Kinetics Database
- Reference simulation: SPC/East Water
- X-ray Photoelectron Spectroscopy Database, version 4.ane
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Condensed phase thermochemistry data
Go To: Top, References, Notes
Data compilation copyright by the U.Due south. Secretary 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*One thousand | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 69.95 | J/mol*Grand | Review | Hunt, 1998 | Information concluding reviewed in March, 1979 |
Liquid Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.fifteen= A*t + B*ttwo/2 + C*tthree/3 + D*t4/iv − E/t + F − H
Southward° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(two*t2) + Grand
Cp = rut capacity (J/mol*Thou)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / one thousand.
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| Temperature (One thousand) | 298. - 500. |
|---|---|
| A | -203.6060 |
| B | 1523.290 |
| C | -3196.413 |
| D | 2474.455 |
| Eastward | three.855326 |
| F | -256.5478 |
| K | -488.7163 |
| H | -285.8304 |
| Reference | Chase, 1998 |
| Comment | Information last reviewed in March, 1979 |
References
Get To: Peak, Condensed stage thermochemistry information, Notes
Data compilation copyright by the U.Southward. 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 Fundamental Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, one. [all information]
Chase, 1998
Chase, Chiliad.West., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
South°liquid Entropy of liquid at standard conditions S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) ΔfH°liquid Enthalpy of germination of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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Heat Of Formation For Water,
Source: https://webbook.nist.gov/cgi/cbook.cgi?ID=C7732185&Mask=2
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