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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 1174. to 2500. |
|---|---|
| A | 50.00000 |
| B | -3.893440×10-8 |
| C | 1.914401×10-8 |
| D | -3.194140×10-9 |
| E | -5.031760×10-9 |
| F | -292.9130 |
| G | 84.85700 |
| H | -270.2220 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1966 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 1174. | 50.00 | 92.88 | 62.21 | 36.01 |
| 1200. | 50.00 | 93.97 | 62.88 | 37.31 |
| 1300. | 50.00 | 97.98 | 65.43 | 42.31 |
| 1400. | 50.00 | 101.7 | 67.89 | 47.31 |
| 1500. | 50.00 | 105.1 | 70.26 | 52.31 |
| 1600. | 50.00 | 108.4 | 72.54 | 57.31 |
| 1700. | 50.00 | 111.4 | 74.74 | 62.31 |
| 1800. | 50.00 | 114.2 | 76.85 | 67.31 |
| 1900. | 50.00 | 116.9 | 78.89 | 72.31 |
| 2000. | 50.00 | 119.5 | 80.86 | 77.31 |
| 2100. | 50.00 | 122.0 | 82.76 | 82.31 |
| 2200. | 50.00 | 124.3 | 84.59 | 87.31 |
| 2300. | 50.00 | 126.5 | 86.37 | 92.31 |
| 2400. | 50.00 | 128.6 | 88.09 | 97.31 |
| 2500. | 50.00 | 130.7 | 89.75 | 102.3 |
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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