iron
- Formula: Fe
- Molecular weight: 55.845
- IUPAC Standard InChI: InChI=1S/Fe
- IUPAC Standard InChIKey: XEEYBQQBJWHFJM-UHFFFAOYSA-N
- CAS Registry Number: 7439-89-6
- Chemical structure:
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- Other data available:
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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 | 12.40 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 34.76 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1978 |
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) | 1809. to 3133.345 |
|---|---|
| A | 46.02400 |
| B | -1.884667×10-8 |
| C | 6.094750×10-9 |
| D | -6.640301×10-10 |
| E | -8.246121×10-9 |
| F | -10.80543 |
| G | 72.54094 |
| H | 12.39502 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1978 |
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 700. | 700. to 1042. | 1042. to 1100. | 1100. to 1809. | 298. to 1809. |
|---|---|---|---|---|---|
| A | 18.42868 | -57767.65 | -325.8859 | -776.7387 | 23.97449 |
| B | 24.64301 | 137919.7 | 28.92876 | 919.4005 | 8.367750 |
| C | -8.913720 | -122773.2 | 0.000000 | -383.7184 | 0.000277 |
| D | 9.664706 | 38682.42 | 0.000000 | 57.08148 | -0.000086 |
| E | -0.012643 | 3993.080 | 411.9629 | 242.1369 | -0.000005 |
| F | -6.573022 | 24078.67 | 745.8231 | 697.6234 | 0.268027 |
| G | 42.51488 | -87364.01 | 241.8766 | -558.3674 | 62.06336 |
| H | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 7.788015 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | α-δ phase; Data last reviewed in March, 1978 | α-δ phase; Data last reviewed in March, 1978 | α-δ phase; Data last reviewed in March, 1978 | α-δ phase; Data last reviewed in March, 1978 | γ phase; Data last reviewed in March, 1978 |
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) ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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