Hematite (Fe2O3)
- Formula: Fe2O3
- Molecular weight: 159.688
- CAS Registry Number: 1317-60-8
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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 (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. - 950. | 950. - 1050. | 1050. - 2500. |
|---|---|---|---|
| A | 93.43834 | 150.6240 | 110.9362 |
| B | 108.3577 | 0.000000 | 32.04714 |
| C | -50.86447 | 0.000000 | -9.192333 |
| D | 25.58683 | 0.000000 | 0.901506 |
| E | -1.611330 | 0.000000 | 5.433677 |
| F | -863.2094 | -875.6066 | -843.1471 |
| G | 161.0719 | 252.8814 | 228.3548 |
| H | -825.5032 | -825.5032 | -825.5032 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | hematite phase; Data last reviewed in June, 1965 | hematite phase; Data last reviewed in June, 1965 | hematite phase; Data last reviewed in June, 1965 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 298. | 103.7 | 87.28 | 87.42 | -0.04 |
| 300. | 104.2 | 87.98 | 87.42 | 0.17 |
| 400. | 120.2 | 120.3 | 91.70 | 11.44 |
| 500. | 131.7 | 148.4 | 100.3 | 24.06 |
| 600. | 141.2 | 173.3 | 110.4 | 37.71 |
| 700. | 149.9 | 195.7 | 121.0 | 52.27 |
| 800. | 158.2 | 216.3 | 131.7 | 67.67 |
| 900. | 166.4 | 235.4 | 142.1 | 83.90 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 950. | 150.6 | 245.2 | 147.3 | 92.99 |
| 1000. | 150.6 | 252.9 | 152.4 | 100.5 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 1050. | 140.4 | 260.2 | 157.3 | 108.1 |
| 1100. | 140.8 | 266.8 | 162.1 | 115.1 |
| 1200. | 141.5 | 279.1 | 171.4 | 129.2 |
| 1300. | 142.3 | 290.4 | 180.1 | 143.4 |
| 1400. | 143.0 | 301.0 | 188.4 | 157.6 |
| 1500. | 143.8 | 310.9 | 196.2 | 172.0 |
| 1600. | 144.5 | 320.2 | 203.7 | 186.4 |
| 1700. | 145.2 | 329.0 | 210.8 | 200.9 |
| 1800. | 145.8 | 337.3 | 217.6 | 215.4 |
| 1900. | 146.3 | 345.2 | 224.1 | 230.0 |
| 2000. | 146.8 | 352.7 | 230.3 | 244.7 |
| 2100. | 147.3 | 359.9 | 236.3 | 259.4 |
| 2200. | 147.7 | 366.7 | 242.1 | 274.2 |
| 2300. | 148.0 | 373.3 | 247.7 | 288.9 |
| 2400. | 148.3 | 379.6 | 253.0 | 303.8 |
| 2500. | 148.6 | 385.7 | 258.2 | 318.6 |
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
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