iron diiodide
- Formula: FeI2
- Molecular weight: 309.654
- CAS Registry Number: 7783-86-0
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Gas phase thermochemistry data
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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°gas | 21.00 | kcal/mol | Review | Chase, 1998 | Data last reviewed in September, 1966 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 83.556 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1966 |
Gas 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) | 2000. - 6000. |
|---|---|
| A | 14.04330 |
| B | 1.707000 |
| C | -0.445909 |
| D | 0.033864 |
| E | -0.409916 |
| F | 16.25010 |
| G | 99.76150 |
| H | 21.00000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in September, 1966 |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, 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 | -16.98 | kcal/mol | Review | Chase, 1998 | Data last reviewed in September, 1966 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 46.709 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1966 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -25.000 | kcal/mol | Review | Chase, 1998 | Data last reviewed in September, 1966 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 40.000 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1966 |
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) | 860. - 2000. |
|---|---|
| A | 27.00000 |
| B | 1.312261×10-10 |
| C | -8.565251×10-11 |
| D | 1.818990×10-11 |
| E | 3.222230×10-12 |
| F | -25.03050 |
| G | 79.38339 |
| H | -16.98040 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in September, 1966 |
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. - 650. | 650. - 860. |
|---|---|---|
| A | 19.54170 | -282.2409 |
| B | 1.793290 | 630.6869 |
| C | -1.847211 | -445.3169 |
| D | 0.972721 | 107.4040 |
| E | 0.005470 | 21.96170 |
| F | -30.87340 | 102.2630 |
| G | 63.21831 | -365.3250 |
| H | -25.00000 | -25.00000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in September, 1966 | Data last reviewed in September, 1966 |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: José A. Martinho Simões
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
C4FeI2O4 (cr) = 4 (g) + FeI2 (cr)
By formula: C4FeI2O4 (cr) = 4CO (g) + FeI2 (cr)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 39.03 ± 0.24 | kcal/mol | TD-HFC | Connor, Demain, et al., 1979 |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction 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]
Connor, Demain, et al., 1979
Connor, J.A.; Demain, C.P.; Skinner, H.A.; Zafarani-Moattar, M.T.,
J. Orgnometal. Chem., 1979, 170, 117. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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