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 (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. - 2286. |
|---|---|
| A | 47.42730 |
| B | 13.13620 |
| C | -3.796501 |
| D | 0.725938 |
| E | -0.336757 |
| F | -563.9310 |
| G | 123.7920 |
| H | -548.1040 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1974 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 298. | 47.23 | 72.02 | 72.06 | -0.01 |
| 300. | 47.30 | 72.34 | 72.06 | 0.08 |
| 400. | 50.02 | 86.35 | 73.95 | 4.96 |
| 500. | 51.79 | 97.72 | 77.60 | 10.06 |
| 600. | 53.16 | 107.3 | 81.77 | 15.31 |
| 700. | 54.32 | 115.6 | 86.02 | 20.68 |
| 800. | 55.35 | 122.9 | 90.18 | 26.17 |
| 900. | 56.29 | 129.5 | 94.19 | 31.75 |
| 1000. | 57.16 | 135.4 | 98.02 | 37.42 |
| 1100. | 57.97 | 140.9 | 101.7 | 43.18 |
| 1200. | 58.74 | 146.0 | 105.2 | 49.01 |
| 1300. | 59.48 | 150.7 | 108.5 | 54.93 |
| 1400. | 60.20 | 155.2 | 111.7 | 60.91 |
| 1500. | 60.89 | 159.3 | 114.7 | 66.96 |
| 1600. | 61.57 | 163.3 | 117.6 | 73.09 |
| 1700. | 62.24 | 167.1 | 120.4 | 79.28 |
| 1800. | 62.90 | 170.6 | 123.1 | 85.53 |
| 1900. | 63.57 | 174.0 | 125.7 | 91.86 |
| 2000. | 64.24 | 177.3 | 128.2 | 98.25 |
| 2100. | 64.92 | 180.5 | 130.6 | 104.7 |
| 2200. | 65.61 | 183.5 | 132.9 | 111.2 |
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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