potassium carbonate
- Formula: CK2O3
- Molecular weight: 138.2055
- CAS Registry Number: 584-08-7
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Solid Phase Heat Capacity (Shomate Equation)
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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. to 1174. |
|---|---|
| A | 97.08093 |
| B | 94.22326 |
| C | -2.053291 |
| D | 0.709644 |
| E | -0.947860 |
| F | -1186.499 |
| G | 239.5834 |
| H | -1150.182 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1966 |
| 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. | 114.3 | 155.4 | 155.5 | -0.04 |
| 300. | 114.7 | 156.1 | 155.5 | 0.19 |
| 400. | 128.6 | 191.1 | 160.2 | 12.38 |
| 500. | 140.0 | 221.1 | 169.4 | 25.82 |
| 600. | 150.4 | 247.5 | 180.3 | 40.35 |
| 700. | 160.3 | 271.5 | 191.6 | 55.89 |
| 800. | 170.0 | 293.5 | 203.0 | 72.41 |
| 900. | 179.6 | 314.1 | 214.2 | 89.89 |
| 1000. | 189.0 | 333.5 | 225.2 | 108.3 |
| 1100. | 198.4 | 351.9 | 235.9 | 127.7 |
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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