barium oxide, obtained by calcining witherite
- Formula: BaO
- Molecular weight: 153.326
- IUPAC Standard InChI: InChI=1S/Ba.O
- IUPAC Standard InChIKey: QVQLCTNNEUAWMS-UHFFFAOYSA-N
- CAS Registry Number: 1304-28-5
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: barium oxide; Barium monoxide
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Solid Phase Heat Capacity (Shomate Equation)
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.
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. - 2286. |
|---|---|
| A | 11.33540 |
| B | 3.139628 |
| C | -0.907385 |
| D | 0.173503 |
| E | -0.080487 |
| F | -134.7827 |
| G | 29.58700 |
| H | -131.0000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1974 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 298. | 11.29 | 17.21 | 17.22 | -0.00 |
| 300. | 11.31 | 17.29 | 17.22 | 0.02 |
| 400. | 11.95 | 20.64 | 17.68 | 1.19 |
| 500. | 12.38 | 23.35 | 18.55 | 2.40 |
| 600. | 12.71 | 25.64 | 19.54 | 3.66 |
| 700. | 12.98 | 27.62 | 20.56 | 4.94 |
| 800. | 13.23 | 29.37 | 21.55 | 6.25 |
| 900. | 13.45 | 30.94 | 22.51 | 7.59 |
| 1000. | 13.66 | 32.37 | 23.43 | 8.94 |
| 1100. | 13.86 | 33.68 | 24.30 | 10.32 |
| 1200. | 14.04 | 34.90 | 25.13 | 11.71 |
| 1300. | 14.22 | 36.03 | 25.93 | 13.13 |
| 1400. | 14.39 | 37.09 | 26.69 | 14.56 |
| 1500. | 14.55 | 38.08 | 27.41 | 16.00 |
| 1600. | 14.72 | 39.03 | 28.11 | 17.47 |
| 1700. | 14.87 | 39.93 | 28.78 | 18.95 |
| 1800. | 15.03 | 40.78 | 29.42 | 20.44 |
| 1900. | 15.19 | 41.60 | 30.04 | 21.95 |
| 2000. | 15.35 | 42.38 | 30.64 | 23.48 |
| 2100. | 15.52 | 43.13 | 31.22 | 25.03 |
| 2200. | 15.68 | 43.86 | 31.78 | 26.59 |
References
Go To: Top, Solid Phase Heat Capacity (Shomate Equation), 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]
Notes
Go To: Top, Solid Phase Heat Capacity (Shomate Equation), References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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