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
Δfgas-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. to 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
Δfliquid-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
Δfsolid-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. to 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. to 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

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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]

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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