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Cyanogen

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Phase change 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.

Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Tboil252.0KN/AWeast and Grasselli, 1989BS
Tboil252.KN/AMajer and Svoboda, 1985 
Quantity Value Units Method Reference Comment
Ttriple245.32KN/ARuehrwein and Giauque, 1939Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Ptriple0.751barN/AHamann, Mcmanamey, et al., 1953Uncertainty assigned by TRC = 0.0133 bar; TRC
Quantity Value Units Method Reference Comment
Deltavap20.8kJ/molN/AMajer and Svoboda, 1985 

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
23.330252.0N/ARuehrwein and Giauque, 1939, 2P = 101.325 kPa; DH
23.33252.N/AMajer and Svoboda, 1985 
24.5246.AStephenson and Malanowski, 1987Based on data from 240. - 253. K.; AC
23.3 ± 0.2251.95VRuehrwein and Giauque, 1939, 3ALS
23.9257.N/APerry and Bardwell, 1925Based on data from 246. - 273. K.; AC
23.5267.N/APerry and Bardwell, 1925Based on data from 246. - 273. K.; AC

Entropy of vaporization

DeltavapS (J/mol*K) Temperature (K) Reference Comment
92.58252.0Ruehrwein and Giauque, 1939, 2P; DH

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
252. - 391.34.516611041.518-21.288Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
33.0224.N/AStephenson and Malanowski, 1987Based on data from 202. - 239. K.; AC
32.4224.N/AGovers, 1975Based on data from 198. - 240. K. See also Perry and Bardwell, 1925.; AC
33.6204.AStull, 1947Based on data from 177. - 230. K.; AC
34.4202. - 245.CATHRuehrwein and Giauque, 1939, 2AC

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
8.109245.32Ruehrwein and Giauque, 1939, 2DH
8.11245.3Domalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
33.05245.32Ruehrwein and Giauque, 1939, 2DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


References

Go To: Top, Phase change data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Ruehrwein and Giauque, 1939
Ruehrwein, R.A.; Giauque, W.F., The entropy of cyanogen heat capacity and vapor pressure of solid and liquid heats of fusion and vaporization, J. Am. Chem. Soc., 1939, 61, 2940-4. [all data]

Hamann, Mcmanamey, et al., 1953
Hamann, S.D.; Mcmanamey, W.J.; Pearse, J.F., The forces between polyatomic molecules, Trans. Faraday Soc., 1953, 49, 351. [all data]

Ruehrwein and Giauque, 1939, 2
Ruehrwein, R.A.; Giauque, W.F., The entropy of cyanogen. Heat capacity and vapor pressure of solid and liquid. Heats of fusion and vaporization, J. Am. Chem. Soc., 1939, 61, 2940-2944. [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]

Ruehrwein and Giauque, 1939, 3
Ruehrwein, R.A.; Giauque, W.F., The entropy of cyanogen. Heat capacity and vapor pressure of solid and liquid. Heats of fusion and vaporization, J. Am. Chem. Soc., 1939, 61, 2940-29. [all data]

Perry and Bardwell, 1925
Perry, John H.; Bardwell, D.C., THE VAPOR PRESSURES OF SOLID AND LIQUID CYANOGEN 1, J. Am. Chem. Soc., 1925, 47, 11, 2629-2632, https://doi.org/10.1021/ja01688a002 . [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]

Govers, 1975
Govers, H.A.J., Derivation of carbon--nitrogen, hydrogen--nitrogen and nitrogen--nitrogen non-bonded potential parameters in molecular crystals, Acta Crystallogr Sect A Cryst Phys Diffr Theor Gen Crystallogr', 1975, 31, 3, 380-385, https://doi.org/10.1107/S0567739475000800 . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]


Notes

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