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

Acetylene

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, 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:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas226.73kJ/molReviewChase, 1998Data last reviewed in March, 1961
Deltafgas227.4 ± 0.8kJ/molReviewManion, 2002adopted recommendation of Gurvich, Veyts, et al., 1991; DRB
Deltafgas226.7 ± 0.79kJ/molCcbWagman, Kilpatrick, et al., 1945Unpublished work of E. J. Prosen; ALS
Quantity Value Units Method Reference Comment
gas,1 bar200.93J/mol*KReviewChase, 1998Data last reviewed in March, 1961

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
29.35100.Gurvich, Veyts, et al., 1989p=1 bar.; GT
35.57200.
44.04298.15
44.17300.
50.39400.
54.75500.
58.12600.
60.97700.
63.51800.
65.83900.
67.961000.
69.911100.
71.691200.
73.301300.
74.761400.
76.081500.
77.271600.
78.351700.
79.321800.
80.211900.
81.012000.
81.742100.
82.412200.
83.032300.
83.602400.
84.122500.
84.612600.
85.062700.
85.492800.
85.892900.
86.263000.

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. - 1100.1100. - 6000.
A 40.6869767.47244
B 40.7327911.75110
C -16.17840-2.021470
D 3.6697410.136195
E -0.658411-9.806418
F 210.7067185.4550
G 235.0052253.5337
H 226.7314226.7314
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in March, 1961 Data last reviewed in March, 1961

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]

Manion, 2002
Manion, J.A., Evaluated Enthalpies of Formation of the Stable Closed Shell C1 and C2 Chlorinated Hydrocarbons, J. Phys. Chem. Ref. Data, 2002, 31, 1, 123-172, https://doi.org/10.1063/1.1420703 . [all data]

Gurvich, Veyts, et al., 1991
Thermodynamic Properties of Individual Substances, 4th edition, Volume 2, Gurvich, L.V.; Veyts, I.V.; Alcock, C.B.;, ed(s)., Hemisphere, New York, 1991. [all data]

Wagman, Kilpatrick, et al., 1945
Wagman, D.D.; Kilpatrick, J.E.; Pitzer, K.S.; Rossini, F.D., Heats, equilibrium constants, and free energies of formation of the acetylene hydrocarbons through the pentynes, to 1,500° K, J. Res. NBS, 1945, 35, 467-496. [all data]

Gurvich, Veyts, et al., 1989
Gurvich, L.V.; Veyts, I.V.; Alcock, C.B., Thermodynamic Properties of Individual Substances, 4th ed.; Vols. 1 and 2, Hemisphere, New York, 1989. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, References