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potassium metaborate


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-674.04kJ/molReviewChase, 1998Data last reviewed in June, 1971
Quantity Value Units Method Reference Comment
gas,1 bar297.41J/mol*KReviewChase, 1998Data last reviewed in June, 1971

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) 2000. - 6000.
A 81.37127
B 0.946668
C -0.185088
D 0.012484
E -5.600702
F -712.0164
G 376.8089
H -674.0424
ReferenceChase, 1998
Comment Data last reviewed in June, 1971

Condensed 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
Deltafliquid-980.73kJ/molReviewChase, 1998Data last reviewed in June, 1971
Quantity Value Units Method Reference Comment
liquid,1 bar88.44J/mol*KReviewChase, 1998Data last reviewed in June, 1971
Quantity Value Units Method Reference Comment
Deltafsolid-994.96kJ/molReviewChase, 1998Data last reviewed in June, 1971
Quantity Value Units Method Reference Comment
solid79.97J/mol*KReviewChase, 1998Data last reviewed in June, 1971

Liquid 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) 1220. - 2000.
A 146.4400
B -3.790454×10-7
C 2.080155×10-7
D -3.939274×10-8
E -3.941705×10-8
F -1055.493
G 202.3868
H -980.7296
ReferenceChase, 1998
Comment Data last reviewed in June, 1971

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. - 1220.
A 41.74954
B 119.6164
C -71.80664
D 15.10098
E -0.390727
F -1013.432
G 95.68557
H -994.9552
ReferenceChase, 1998
Comment Data last reviewed in June, 1971

Gas phase ion energetics 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:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
B - John E. Bartmess

Electron affinity determinations

EA (eV) Method Reference Comment
1.17 ± 0.22EIAEShevchenko, Iljin, et al., 1976From K2BO2F; value altered from reference due to conversion from electron convention to ion convention; B

Ionization energy determinations

IE (eV) Method Reference Comment
8. ± 1.EIFarber and Srivastava, 1985LBLHLM
8.62 ± 0.14EIShevchenko, Iljin, et al., 1976LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
K+9.47 ± 0.20BO2EIShevchenko, Iljin, et al., 1976LLK

References

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

Shevchenko, Iljin, et al., 1976
Shevchenko, V.E.; Iljin, M.K.; Nikitin, O.T.; Sidorov, L.N., Mass-spectrometric study of mixed dimers M2BO2F, Int. J. Mass Spectrom. Ion Phys., 1976, 21, 279. [all data]

Farber and Srivastava, 1985
Farber, M.; Srivastava, R.D., Electron impact and thermodynamic studies of potassium metaborate, J. Chem. Soc. Faraday Trans. 1, 1985, 81, 913. [all data]


Notes

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