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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Gas 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) | 5000. - 6000. |
|---|---|
| A | -299.0511 |
| B | 121.1577 |
| C | -16.48234 |
| D | 0.763597 |
| E | 694.5268 |
| F | 710.3179 |
| G | 147.2483 |
| H | -29.59990 |
| 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) |
|---|---|---|---|---|
| 5000. | 17.91 | 83.63 | 73.07 | 52.78 |
| 5100. | 18.14 | 83.99 | 73.28 | 54.58 |
| 5200. | 18.34 | 84.34 | 73.49 | 56.40 |
| 5300. | 18.50 | 84.69 | 73.70 | 58.25 |
| 5400. | 18.63 | 85.04 | 73.91 | 60.10 |
| 5500. | 18.73 | 85.38 | 74.11 | 61.97 |
| 5600. | 18.79 | 85.72 | 74.32 | 63.85 |
| 5700. | 18.83 | 86.05 | 74.52 | 65.73 |
| 5800. | 18.83 | 86.38 | 74.72 | 67.61 |
| 5900. | 18.81 | 86.70 | 74.92 | 69.49 |
| 6000. | 18.76 | 87.02 | 75.12 | 71.37 |
References
Go To: Top, Gas 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, Gas Phase Heat Capacity (Shomate Equation), References
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