Disulfur difluoride


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.

Quantity Value Units Method Reference Comment
Δfgas-95.939kcal/molReviewChase, 1998Data last reviewed in September, 1966
Quantity Value Units Method Reference Comment
gas,1 bar69.981cal/mol*KReviewChase, 1998Data last reviewed in September, 1966

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.

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Temperature (K) 298. to 2000.2000. to 6000.
A 16.6684819.76520
B 5.7264820.075008
C -3.652916-0.019955
D 0.7872160.001901
E -0.268117-0.566852
F -102.0347-103.6193
G 87.0917891.04015
H -95.94001-95.94001
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in September, 1966 Data last reviewed in September, 1966

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 by: William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Reference Comment
3.56168.Dykyj, Svoboda, et al., 1999Based on data from 153. to 196. K.

References

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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]

Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R., Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [all data]


Notes

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