diiron trioxide hydrate
- Formula: FeH3O3
- Molecular weight: 106.867
- CAS Registry Number: 1309-33-7
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Solid Phase Heat Capacity (Shomate Equation)
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.
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. - 1500. |
|---|---|
| A | 15.55710 |
| B | 43.56140 |
| C | -24.07199 |
| D | 4.550870 |
| E | -0.197261 |
| F | -206.0360 |
| G | 30.74990 |
| H | -199.0000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 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) |
|---|---|---|---|---|
| 298. | 24.30 | 24.98 | 25.00 | -0.01 |
| 300. | 24.39 | 25.14 | 25.00 | 0.04 |
| 400. | 28.19 | 32.71 | 26.01 | 2.68 |
| 500. | 31.10 | 39.32 | 28.02 | 5.65 |
| 600. | 33.46 | 45.21 | 30.40 | 8.88 |
| 700. | 35.41 | 50.52 | 32.90 | 12.33 |
| 800. | 37.02 | 55.36 | 35.41 | 15.95 |
| 900. | 38.34 | 59.79 | 37.88 | 19.72 |
| 1000. | 39.40 | 63.89 | 40.28 | 23.61 |
| 1100. | 40.24 | 67.69 | 42.60 | 27.60 |
| 1200. | 40.89 | 71.22 | 44.84 | 31.65 |
| 1300. | 41.39 | 74.51 | 47.00 | 35.77 |
| 1400. | 41.75 | 77.59 | 49.07 | 39.93 |
| 1500. | 42.01 | 80.48 | 51.07 | 44.12 |
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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