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1,2-Propadiene-1,3-dione


Gas phase thermochemistry 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Deltafgas-93.64kJ/molReviewChase, 1998Data last reviewed in June, 1968
Deltafgas-97.8 ± 1.8kJ/molCcrKybett, Johnson, et al., 1965ALS
Quantity Value Units Method Reference Comment
gas,1 bar276.07J/mol*KReviewChase, 1998Data last reviewed in June, 1968

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. - 1200.1200. - 6000.
A 51.83223106.5761
B 82.079203.008431
C -44.90311-0.585714
D 9.1307850.039383
E -0.494976-12.06958
F -114.0219-153.2486
G 313.4544367.6627
H -93.63792-93.63792
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1968 Data last reviewed in June, 1968

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]

Kybett, Johnson, et al., 1965
Kybett, B.D.; Johnson, G.K.; Barker, C.K.; Margrave, J.L., The heats of formation and polymerization of carbon suboxide, J. Phys. Chem., 1965, 69, 3603-3606. [all data]


Notes

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