Heat Of Formation Of Water
Water
- Formula: H2O
- Molecular weight: 18.0153
-
IUPAC Standard InChI: InChI=1S/H2O/h1H2
- IUPAC Standard InChIKey: XLYOFNOQVPJJNP-UHFFFAOYSA-N
- CAS Registry Number: 7732-eighteen-5
- Chemical construction:
This construction is also bachelor equally a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Isotopologues:
- Deuterium oxide
- Water-t
- H2o-18O
- Water-d
- Water-ttwo
- Deuterium oxide
- Other names: Water vapor; Distilled water; Ice; H2o; Dihydrogen oxide; steam; Tritiotope
- Permanent link for this species. Utilize this link for bookmarking this species for future reference.
- Information on this page:
- Gas phase thermochemistry information
- References
- Notes
- Other data bachelor:
- Condensed stage thermochemistry data
- Stage change information
- Reaction thermochemistry data: reactions ane 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 1151 to 1200, reactions 1201 to 1250, reactions 1251 to 1300, reactions 1301 to 1350, reactions 1351 to 1360
- Gas stage ion energetics data
- Ion clustering data
- IR Spectrum
- Mass spectrum (electron ionization)
- Vibrational and/or electronic free energy levels
- Gas Chromatography
- Fluid Properties
- Data at other public NIST sites:
- Microwave spectra (on physics lab spider web site)
- Electron-Impact Ionization Cross Sections (on physics web site)
- Computational Chemistry Comparison and Benchmark Database
- Gas Phase Kinetics Database
- Reference simulation: SPC/E Water
- X-ray Photoelectron Spectroscopy Database, version iv.one
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Gas stage thermochemistry data
Go To: Top, References, Notes
Data compilation copyright by the U.Due south. Secretarial assistant of Commerce on behalf of the U.s.a.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Annotate |
|---|---|---|---|---|---|
| ΔfH°gas | -241.826 ± 0.040 | kJ/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| ΔfH°gas | -241.83 | kJ/mol | Review | Chase, 1998 | Data concluding reviewed in March, 1979 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 188.835 ± 0.010 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| S°gas,1 bar | 188.84 | J/mol*Thou | Review | Chase, 1998 | Data last reviewed in March, 1979 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*tiii/iii + D*t4/4 − E/t + F − H
South° = A*ln(t) + B*t + C*t2/2 + D*tthree/3 − E/(two*t2) + Thousand
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / grand.
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| Temperature (One thousand) | 500. - 1700. | 1700. - 6000. |
|---|---|---|
| A | thirty.09200 | 41.96426 |
| B | 6.832514 | eight.622053 |
| C | 6.793435 | -1.499780 |
| D | -2.534480 | 0.098119 |
| E | 0.082139 | -eleven.15764 |
| F | -250.8810 | -272.1797 |
| G | 223.3967 | 219.7809 |
| H | -241.8264 | -241.8264 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in March, 1979 | Data last reviewed in March, 1979 |
References
Go To: Superlative, Gas phase thermochemistry information, Notes
Information compilation copyright by the U.Southward. Secretarial assistant 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.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Information, Monograph 9, 1998, one-1951. [all data]
Notes
Become To: Pinnacle, Gas phase thermochemistry data, References
- Symbols used in this document:
South°gas,i bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of germination of gas at standard atmospheric condition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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Heat Of Formation Of Water,
Source: https://webbook.nist.gov/cgi/cbook.cgi?ID=C7732185&Mask=1
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