magnetite
- Formula: Fe3O4
- Molecular weight: 231.533
- CAS Registry Number: 1309-38-2
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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. to 900. | 900. to 3000. |
|---|---|---|
| A | 104.2096 | 200.8320 |
| B | 178.5108 | 1.586435×10-7 |
| C | 10.61510 | -6.661682×10-8 |
| D | 1.132534 | 9.452452×10-9 |
| E | -0.994202 | 3.186020×10-8 |
| F | -1163.336 | -1174.135 |
| G | 212.0585 | 388.0790 |
| H | -1120.894 | -1120.894 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | magnetite phase; Data last reviewed in June, 1965 | magnetite 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. | 147.2 | 145.2 | 145.3 | -0.03 |
| 300. | 147.7 | 146.2 | 145.3 | 0.27 |
| 400. | 171.2 | 192.0 | 151.4 | 16.24 |
| 500. | 192.3 | 232.4 | 163.6 | 34.43 |
| 600. | 212.6 | 269.3 | 178.2 | 54.67 |
| 700. | 232.7 | 303.6 | 193.7 | 76.94 |
| 800. | 252.8 | 336.0 | 209.5 | 101.2 |
| 900. | 273.1 | 366.9 | 225.2 | 127.5 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 900. | 200.8 | 366.9 | 225.2 | 127.5 |
| 1000. | 200.8 | 388.1 | 240.5 | 147.6 |
| 1100. | 200.8 | 407.2 | 254.8 | 167.7 |
| 1200. | 200.8 | 424.7 | 268.2 | 187.8 |
| 1300. | 200.8 | 440.8 | 280.9 | 207.8 |
| 1400. | 200.8 | 455.7 | 292.9 | 227.9 |
| 1500. | 200.8 | 469.5 | 304.2 | 248.0 |
| 1600. | 200.8 | 482.5 | 314.9 | 268.1 |
| 1700. | 200.8 | 494.6 | 325.1 | 288.2 |
| 1800. | 200.8 | 506.1 | 334.9 | 308.3 |
| 1900. | 200.8 | 517.0 | 344.2 | 328.3 |
| 2000. | 200.8 | 527.3 | 353.1 | 348.4 |
| 2100. | 200.8 | 537.1 | 361.6 | 368.5 |
| 2200. | 200.8 | 546.4 | 369.8 | 388.6 |
| 2300. | 200.8 | 555.4 | 377.7 | 408.7 |
| 2400. | 200.8 | 563.9 | 385.3 | 428.8 |
| 2500. | 200.8 | 572.1 | 392.6 | 448.8 |
| 2600. | 200.8 | 580.0 | 399.6 | 468.9 |
| 2700. | 200.8 | 587.6 | 406.4 | 489.0 |
| 2800. | 200.8 | 594.9 | 413.0 | 509.1 |
| 2900. | 200.8 | 601.9 | 419.4 | 529.2 |
| 3000. | 200.8 | 608.7 | 425.6 | 549.3 |
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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