beryllium oxide
- Formula: BeO
- Molecular weight: 25.0116
- IUPAC Standard InChI: InChI=1S/Be.O
- IUPAC Standard InChIKey: LTPBRCUWZOMYOC-UHFFFAOYSA-N
- CAS Registry Number: 1304-56-9
- 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. - Other names: Beryllium monoxide
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Condensed phase 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -542.71 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1975 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 35.86 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1975 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -609.4 ± 2.5 | kJ/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| ΔfH°solid | -608.35 | kJ/mol | Review | Chase, 1998 | α phase; Data last reviewed in June, 1975 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 13.77 ± 0.04 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
Liquid 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*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 2780. to 5000. |
|---|---|
| A | 79.49600 |
| B | 7.057823×10-8 |
| C | -1.617753×10-8 |
| D | 1.275735×10-9 |
| E | 9.949218×10-8 |
| F | -616.9559 |
| G | 66.38334 |
| H | -542.7066 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1975 |
Solid 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*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 800. | 800. to 2780. | 298. to 1500. | 1500. to 2780. |
|---|---|---|---|---|
| A | 3.358974 | 47.06205 | 24.68978 | 48.35281 |
| B | 131.5922 | 5.598359 | 52.56317 | 4.393033 |
| C | -140.4937 | -0.495570 | -36.35239 | -0.090144 |
| D | 56.20953 | 0.054527 | 9.487932 | 0.007823 |
| E | -0.536669 | -2.947373 | -1.053896 | -3.469105 |
| F | -615.8764 | -631.6794 | -614.6045 | -626.3113 |
| G | -18.67884 | 54.76479 | 26.35983 | 58.35048 |
| H | -608.3536 | -608.3536 | -601.6592 | -601.6592 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | α phase; Data last reviewed in June, 1975 | α phase; Data last reviewed in June, 1975 | β phase; Data last reviewed in June, 1975 | β phase; Data last reviewed in June, 1975 |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A.,
CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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