potassium hydrogendifluoride
- Formula: F2HK
- Molecular weight: 78.1030
- CAS Registry Number: 7789-29-9
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Condensed phase thermochemistry data
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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -219.07 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 31.733 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -222.57 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 24.919 | cal/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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 511.95 to 2000. |
|---|---|
| A | 25.00000 |
| B | 2.861831×10-13 |
| C | 0.000000 |
| D | 0.000000 |
| E | 7.815971×10-14 |
| F | -226.6220 |
| G | 61.65141 |
| H | -219.0660 |
| 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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 469. | 469. to 511.95 |
|---|---|---|
| A | 4.263022 | 23.96011 |
| B | 71.97641 | -5.138339×10-9 |
| C | -119.1170 | 3.527689×10-9 |
| D | 96.73829 | -8.012651×10-10 |
| E | 0.061442 | -1.979451×10-10 |
| F | -225.9730 | -227.6720 |
| G | 13.40410 | 57.86511 |
| H | -222.5700 | -222.5700 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1971 | 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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