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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- Information on this page:
- Other data available:
- Data at other public NIST sites:
- NIST Atomic Spectra Database - Lines Holdings (on physics web site)
- NIST Atomic Spectra Database - Levels Holdings (on physics web site)
- NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
- Gas Phase Kinetics Database
- X-ray Photoelectron Spectroscopy Database, version 5.0
- Options:
Gas 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) | 3133.345 - 6000. |
|---|---|
| A | 11.29253 |
| B | 6.989707 |
| C | -1.110305 |
| D | 0.122354 |
| E | 5.689278 |
| F | 423.5380 |
| G | 206.3591 |
| H | 415.4716 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1978 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 3133. | 26.64 | 236.7 | 215.1 | 67.51 |
| 3200. | 26.85 | 237.2 | 215.6 | 69.29 |
| 3300. | 27.19 | 238.1 | 216.3 | 71.99 |
| 3400. | 27.52 | 238.9 | 216.9 | 74.73 |
| 3500. | 27.87 | 239.7 | 217.5 | 77.50 |
| 3600. | 28.21 | 240.5 | 218.2 | 80.30 |
| 3700. | 28.57 | 241.3 | 218.8 | 83.14 |
| 3800. | 28.93 | 242.0 | 219.4 | 86.02 |
| 3900. | 29.30 | 242.8 | 220.0 | 88.93 |
| 4000. | 29.67 | 243.5 | 220.6 | 91.88 |
| 4100. | 30.06 | 244.3 | 221.1 | 94.86 |
| 4200. | 30.45 | 245.0 | 221.7 | 97.89 |
| 4300. | 30.85 | 245.7 | 222.2 | 101.0 |
| 4400. | 31.27 | 246.4 | 222.8 | 104.1 |
| 4500. | 31.69 | 247.1 | 223.3 | 107.2 |
| 4600. | 32.13 | 247.8 | 223.8 | 110.4 |
| 4700. | 32.58 | 248.5 | 224.4 | 113.6 |
| 4800. | 33.04 | 249.2 | 224.9 | 116.9 |
| 4900. | 33.52 | 249.9 | 225.4 | 120.2 |
| 5000. | 34.01 | 250.6 | 225.9 | 123.6 |
| 5100. | 34.51 | 251.3 | 226.4 | 127.0 |
| 5200. | 35.03 | 251.9 | 226.8 | 130.5 |
| 5300. | 35.57 | 252.6 | 227.3 | 134.0 |
| 5400. | 36.12 | 253.3 | 227.8 | 137.6 |
| 5500. | 36.69 | 254.0 | 228.3 | 141.3 |
| 5600. | 37.28 | 254.6 | 228.7 | 145.0 |
| 5700. | 37.89 | 255.3 | 229.2 | 148.7 |
| 5800. | 38.52 | 255.9 | 229.6 | 152.6 |
| 5900. | 39.17 | 256.6 | 230.1 | 156.4 |
| 6000. | 39.85 | 257.3 | 230.5 | 160.4 |
References
Go To: Top, Gas 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, Gas Phase Heat Capacity (Shomate Equation), References
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