calcium oxide
- Formula: CaO
- Molecular weight: 56.077
- IUPAC Standard InChI: InChI=1S/Ca.O
- IUPAC Standard InChIKey: ODINCKMPIJJUCX-UHFFFAOYSA-N
- CAS Registry Number: 1305-78-8
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Calcium 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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 4500. - 6000. |
|---|---|
| A | 358.0508 |
| B | -117.9888 |
| C | 16.67943 |
| D | -0.832390 |
| E | -615.0940 |
| F | -713.7737 |
| G | 172.4967 |
| H | 43.93200 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1973 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 4500. | 58.63 | 338.9 | 290.7 | 216.9 |
| 4600. | 58.15 | 340.1 | 291.7 | 222.7 |
| 4700. | 57.69 | 341.4 | 292.8 | 228.5 |
| 4800. | 57.25 | 342.6 | 293.8 | 234.3 |
| 4900. | 56.83 | 343.8 | 294.8 | 240.0 |
| 5000. | 56.44 | 344.9 | 295.8 | 245.6 |
| 5100. | 56.07 | 346.0 | 296.8 | 251.2 |
| 5200. | 55.73 | 347.1 | 297.7 | 256.8 |
| 5300. | 55.41 | 348.2 | 298.7 | 262.4 |
| 5400. | 55.12 | 349.2 | 299.6 | 267.9 |
| 5500. | 54.84 | 350.2 | 300.5 | 273.4 |
| 5600. | 54.59 | 351.2 | 301.4 | 278.9 |
| 5700. | 54.34 | 352.2 | 302.3 | 284.3 |
| 5800. | 54.12 | 353.1 | 303.2 | 289.8 |
| 5900. | 53.90 | 354.0 | 304.0 | 295.2 |
| 6000. | 53.70 | 354.9 | 304.9 | 300.5 |
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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