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Boric acid


Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, References, Notes

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-992.28kJ/molReviewChase, 1998Data last reviewed in December, 1964
Quantity Value Units Method Reference Comment
gas,1 bar295.23J/mol*KReviewChase, 1998Data last reviewed in December, 1964

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 22.91803123.6309
B 182.031211.27103
C -125.7518-2.150124
D 34.687490.142479
E -0.145463-20.84674
F -1006.649-1075.104
G 273.1524383.4117
H -992.2774-992.2774
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1964 Data last reviewed in December, 1964

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, References, Notes

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
Deltafsolid-1094.8 ± 0.8kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Deltafsolid-1093.99kJ/molReviewChase, 1998Data last reviewed in December, 1964
Quantity Value Units Method Reference Comment
solid,1 bar89.95 ± 0.60J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
Quantity Value Units Method Reference Comment
solid88.70J/mol*KReviewChase, 1998Data last reviewed in December, 1964

Solid 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. - 1500.
A 40.82396
B 195.2296
C -86.64855
D 13.60210
E -0.919735
F -1117.203
G 78.45126
H -1093.990
ReferenceChase, 1998
Comment Data last reviewed in December, 1964

References

Go To: Top, Gas phase thermochemistry data, Condensed 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]

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]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References