Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Cyanogen

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase thermochemistry data

Go To: Top, 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Deltafgas73.870kcal/molReviewChase, 1998Data last reviewed in March, 1961
Deltafgas73.84 ± 0.43kcal/molCcbKnowlton and Prosen, 1951ALS
Deltafgas62.9kcal/molCmMcMorris and Badger, 1933ALS
Deltafgas73.30 ± 0.20kcal/molCcbWartenberg and Schutza, 1933Reanalyzed by Cox and Pilcher, 1970, Original value = 72.8 ± 0.2 kcal/mol; ALS
Quantity Value Units Method Reference Comment
Deltacgas-261.94 ± 0.43kcal/molCcbKnowlton and Prosen, 1951ALS
Deltacgas-251.4 ± 1.2kcal/molCmMcMorris and Badger, 1933ALS
Deltacgas-261.40 ± 0.20kcal/molCcbWartenberg and Schutza, 1933Reanalyzed by Cox and Pilcher, 1970, Original value = -261.3 ± 0.2 kcal/mol; ALS
Quantity Value Units Method Reference Comment
gas,1 bar57.737cal/mol*KReviewChase, 1998Data last reviewed in March, 1961

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.

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

View table.

Temperature (K) 298. - 1300.1300. - 6000.
A 12.3549019.83990
B 8.7938600.528003
C -2.978380-0.100319
D 0.1677350.006615
E -0.102472-2.224821
F 69.4778063.10569
G 69.6196075.45870
H 73.8701073.87010
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in March, 1961 Data last reviewed in March, 1961

Condensed phase thermochemistry data

Go To: Top, Gas 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: Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
liquid33.181cal/mol*KN/ARuehrwein and Giauque, 1939 

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
25.270255.Ruehrwein and Giauque, 1939T = 15 to 252 K.

References

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

Knowlton and Prosen, 1951
Knowlton, J.W.; Prosen, E.J., Heat of combustion and formation of cyanogen, J. Res. NBS, 1951, 46, 489-495. [all data]

McMorris and Badger, 1933
McMorris, J.; Badger, R.M., The heat of combustion, entropy and free energy of cyanogen gas, J. Am. Chem. Soc., 1933, 55, 1952-1957. [all data]

Wartenberg and Schutza, 1933
Wartenberg, H.V.; Schutza, H., Die verbrennungswarme des cyans, Z. Phys. Chem., 1933, 164, 386-388. [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]

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, 2940-2944. [all data]


Notes

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