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

Ethyne, difluoro-


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

Quantity Value Units Method Reference Comment
Deltafgas20.92kJ/molReviewChase, 1998Data last reviewed in December, 1967
Deltafgas-190. ± 30.kJ/molEqkEhlert, 1969ALS
Quantity Value Units Method Reference Comment
gas,1 bar244.06J/mol*KReviewChase, 1998Data last reviewed in December, 1967

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. - 1200.1200. - 6000.
A 38.3179585.46531
B 89.708310.982972
C -65.98963-0.192525
D 17.899030.013000
E -0.244157-6.812054
F 5.236527-21.55835
G 265.0840323.6060
H 20.9200420.92004
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1967 Data last reviewed in December, 1967

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]

Ehlert, 1969
Ehlert, T.C., Bonding in C1 and C2 fluroides, J. Phys. Chem., 1969, 73, 949-953. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, References