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 | 2.964 | kcal/mol | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 8.308 | cal/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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 1809. to 3133.345 |
|---|---|
| A | 11.00000 |
| B | -4.504460×10-9 |
| C | 1.456680×10-9 |
| D | -1.587071×10-10 |
| E | -1.970870×10-9 |
| F | -2.582560 |
| G | 17.33770 |
| H | 2.962481 |
| 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 (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 700. | 700. to 1042. | 1042. to 1100. | 1100. to 1809. | 298. to 1809. |
|---|---|---|---|---|---|
| A | 4.404561 | -13806.80 | -77.88860 | -185.6450 | 5.730041 |
| B | 5.889821 | 32963.60 | 6.914140 | 219.7420 | 1.999941 |
| C | -2.130430 | -29343.50 | 0.000000 | -91.71090 | 0.000066 |
| D | 2.309920 | 9245.320 | 0.000000 | 13.64280 | -0.000021 |
| E | -0.003022 | 954.3690 | 98.46150 | 57.87211 | -0.000001 |
| F | -1.570990 | 5754.940 | 178.2560 | 166.7360 | 0.064060 |
| G | 10.16130 | -20880.50 | 57.80990 | -133.4530 | 14.83350 |
| H | 0.000000 | 0.000000 | 0.000000 | 0.000000 | 1.861381 |
| 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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