potassium metaborate
- Formula: BKO2
- Molecular weight: 81.908
- CAS Registry Number: 13709-94-9
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Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -980.73 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 88.44 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -994.96 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 79.97 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1971 |
Liquid Phase Heat Capacity (Shomate Equation)
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) | 1220. to 2000. |
|---|---|
| A | 146.4400 |
| B | -3.790454×10-7 |
| C | 2.080155×10-7 |
| D | -3.939274×10-8 |
| E | -3.941705×10-8 |
| F | -1055.493 |
| G | 202.3868 |
| H | -980.7296 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1971 |
Solid Phase Heat Capacity (Shomate Equation)
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 1220. |
|---|---|
| A | 41.74954 |
| B | 119.6164 |
| C | -71.80664 |
| D | 15.10098 |
| E | -0.390727 |
| F | -1013.432 |
| G | 95.68557 |
| H | -994.9552 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1971 |
References
Go To: Top, Condensed phase thermochemistry data, 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, Condensed phase thermochemistry data, References
- Symbols used in this document:
S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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