Cyanogen iodide


Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change 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.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas225.94kJ/molReviewChase, 1998Data last reviewed in June, 1969
Δfgas224.6 ± 4.3kJ/molCmLord and Woolf, 1954Reanalyzed by Cox and Pilcher, 1970, Original value = 219. kJ/mol; Heat of hydrolysis; ALS
Quantity Value Units Method Reference Comment
gas,1 bar257.34J/mol*KReviewChase, 1998Data 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.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Temperature (K) 298. to 1200.1200. to 6000.
A 49.2632560.08266
B 7.5608651.205993
C 3.675051-0.234558
D -2.8805080.015758
E -0.297113-4.021343
F 209.8895199.1258
G 312.8946318.3991
H 225.9364225.9364
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1969 Data last reviewed in June, 1969

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change 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.

Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfsolid164.8 ± 4.3kJ/molCmLord and Woolf, 1954Reanalyzed by Pedley, Naylor, et al., 1986, Original value = 160. kJ/mol; Heat of hydrolysis

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed 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.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Δvap40.0 ± 0.3kJ/molVKetellaar and Kruyer, 1943ALS
Quantity Value Units Method Reference Comment
Δsub59.83 ± 0.42kJ/molVLord and Woolf, 1954Reanalyzed by Cox and Pilcher, 1970, Original value = 59.0 kJ/mol; Heat of hydrolysis; ALS
Δsub59.9 ± 0.2kJ/molVKetellaar and Kruyer, 1943ALS

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
40.0423.AStephenson and Malanowski, 1987Based on data from 419. to 426. K.; AC

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) A B C Reference Comment
298.4 to 414.37.784353335.29214.533Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
59.8 ± 0.4337. to 426.GSMKetelaar and Kruyer, 2010See also Cox and Pilcher, 1970, 2.; AC
59.9352.GSMStephenson and Malanowski, 1987Based on data from 337. to 426. K. See also Ketelaar and Kruyer, 2010.; AC
58.6356.AStull, 1947Based on data from 298. to 414. K.; AC
58.3326.N/AYost and Stone, 1933Based on data from 278. to 374. K.; AC

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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

2Sodium hydroxide + Cyanogen iodide = Sodium iodide + Water + CNO.Na

By formula: 2HNaO + CIN = INa + H2O + CNO.Na

Quantity Value Units Method Reference Comment
Δr-193.9 ± 0.3kJ/molCmLord and Woolf, 1954solid phase; Heat of hydrolysis

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change 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]

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]

Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P., Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]

Ketellaar and Kruyer, 1943
Ketellaar, J.A.A.; Kruyer, S., Der dampfdrunk des jodcyans, Rec. Trav. Chim. Pays-Bas, 1943, 62, 550-552. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Ketelaar and Kruyer, 2010
Ketelaar, J.A.A.; Kruyer, S., Der Dampfdruck des Jodcyans, Recl. Trav. Chim. Pays-Bas, 2010, 62, 8, 550-552, https://doi.org/10.1002/recl.19430620810 . [all data]

Cox and Pilcher, 1970, 2
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press Inc., London, 1970, 643. [all data]

Yost and Stone, 1933
Yost, Don M.; Stone, William E., The Complex Ions Formed by Iodine Cyanide with Cyanide and Iodide Ions. The Vapor Pressure, Free Energy and Dissociation of Iodine Cyanide, J. Am. Chem. Soc., 1933, 55, 5, 1889-1895, https://doi.org/10.1021/ja01332a015 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, References