potassium carbonate
- Formula: CK2O3
- Molecular weight: 138.2055
- CAS Registry Number: 584-08-7
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Liquid 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) | 1174. - 2500. |
|---|---|
| A | 209.2000 |
| B | -1.629015×10-7 |
| C | 8.009850×10-8 |
| D | -1.336428×10-8 |
| E | -2.105289×10-8 |
| F | -1225.548 |
| G | 355.0417 |
| H | -1130.609 |
| 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) |
|---|---|---|---|---|
| 1174. | 209.2 | 388.6 | 260.3 | 150.7 |
| 1200. | 209.2 | 393.2 | 263.1 | 156.1 |
| 1300. | 209.2 | 409.9 | 273.8 | 177.0 |
| 1400. | 209.2 | 425.4 | 284.0 | 197.9 |
| 1500. | 209.2 | 439.9 | 294.0 | 218.9 |
| 1600. | 209.2 | 453.4 | 303.5 | 239.8 |
| 1700. | 209.2 | 466.0 | 312.7 | 260.7 |
| 1800. | 209.2 | 478.0 | 321.6 | 281.6 |
| 1900. | 209.2 | 489.3 | 330.1 | 302.5 |
| 2000. | 209.2 | 500.0 | 338.3 | 323.5 |
| 2100. | 209.2 | 510.3 | 346.3 | 344.4 |
| 2200. | 209.2 | 520.0 | 353.9 | 365.3 |
| 2300. | 209.2 | 529.3 | 361.4 | 386.2 |
| 2400. | 209.2 | 538.2 | 368.5 | 407.1 |
| 2500. | 209.2 | 546.7 | 375.5 | 428.1 |
References
Go To: Top, Liquid 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, Liquid Phase Heat Capacity (Shomate Equation), References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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