Cyanogen iodide
- Formula: CIN
- Molecular weight: 152.9219
- IUPAC Standard InChI: InChI=1S/CIN/c2-1-3
- IUPAC Standard InChIKey: WPBXOELOQKLBDF-UHFFFAOYSA-N
- CAS Registry Number: 506-78-5
- Chemical structure:
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Gas 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.
Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 225.94 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1969 |
| ΔfH°gas | 224.6 ± 4.3 | kJ/mol | Cm | Lord and Woolf, 1954 | Reanalyzed by Cox and Pilcher, 1970, Original value = 219. kJ/mol; Heat of hydrolysis; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 257.34 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1969 |
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 (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 1200. | 1200. to 6000. |
|---|---|---|
| A | 49.26325 | 60.08266 |
| B | 7.560865 | 1.205993 |
| C | 3.675051 | -0.234558 |
| D | -2.880508 | 0.015758 |
| E | -0.297113 | -4.021343 |
| F | 209.8895 | 199.1258 |
| G | 312.8946 | 318.3991 |
| H | 225.9364 | 225.9364 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1969 | Data last reviewed in June, 1969 |
References
Go To: Top, Gas 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]
Lord and Woolf, 1954
Lord, G.; Woolf, A.A.,
The cyanogen halides. Part III. Their heats of formation and free energies,
J. Chem. Soc., 1954, 2546-2551. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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