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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
Deltafgas-241.826 ± 0.040kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Deltafgas-241.83kJ/molReviewChase, 1998Data last reviewed in March, 1979
Quantity Value Units Method Reference Comment
gas,1 bar188.835 ± 0.010J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar188.84J/mol*KReviewChase, 1998Data last reviewed in March, 1979

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) 500. - 1700.1700. - 6000.
A 30.0920041.96426
B 6.8325148.622053
C 6.793435-1.499780
D -2.5344800.098119
E 0.082139-11.15764
F -250.8810-272.1797
G 223.3967219.7809
H -241.8264-241.8264
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in March, 1979 Data last reviewed in March, 1979

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.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]


Notes

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