Potassium fluoride


Gas phase thermochemistry data

Go To: Top, Phase change data, Reaction 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
Δfgas-326.77kJ/molReviewChase, 1998Data last reviewed in June, 1969
Quantity Value Units Method Reference Comment
gas,1 bar226.60J/mol*KReviewChase, 1998Data last reviewed in June, 1969

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.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Temperature (K) 3000. to 6000.
A 37.20911
B 0.861908
C -0.047662
D 0.004070
E -0.201727
F -338.5785
G 270.2433
H -326.7704
ReferenceChase, 1998
Comment Data last reviewed in June, 1969

Phase change data

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

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) A B C Reference Comment
1158. to 1775.4.764637770.106-141.602Stull, 1947Coefficents calculated by NIST from author's data.

Reaction thermochemistry data

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

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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Fluorine anion + Potassium fluoride = (Fluorine anion • Potassium fluoride)

By formula: F- + FK = (F- • FK)

Quantity Value Units Method Reference Comment
Δr223.8 ± 3.3kJ/molTDAsNikitin, Sidorov, et al., 1981gas phase; value altered from reference due to conversion from electron convention to ion convention; B
Δr200. ± 4.2kJ/molTDEqSidorov, Nikitin, et al., 1980gas phase; Fluoride Affinity:1100K, ΔHf(KF2-):298K; value altered from reference due to conversion from electron convention to ion convention; B
Δr>220. ± 21.kJ/molTDEqGusarov, Gorokhov, et al., 1979gas phase; value altered from reference due to conversion from electron convention to ion convention; B
Δr194.kJ/molMSNikitin, Skokan, et al., 1979gas phase; Knudsen cell; M

AlF4- + Potassium fluoride = (AlF4- • Potassium fluoride)

By formula: AlF4- + FK = (AlF4- • FK)

Quantity Value Units Method Reference Comment
Δr120. ± 8.4kJ/molTDAsGusarov, Gorokhov, et al., 1979gas phase; value altered from reference due to conversion from electron convention to ion convention; B

Be2F5- + Potassium fluoride = (Be2F5- • Potassium fluoride)

By formula: Be2F5- + FK = (Be2F5- • FK)

Quantity Value Units Method Reference Comment
Δr290. ± 10.kJ/molN/ANikitin, Sorokin, et al., 1980gas phase; value altered from reference due to conversion from electron convention to ion convention; B

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction 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]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Nikitin, Sidorov, et al., 1981
Nikitin, M.I.; Sidorov, L.N.; Skokan, E.V.; Sorokin, I.D., Mass spectrometric determination of the heats of formation of ScF4- and KF2-, Russ. J. Phys. Chem., 1981, 55, 1107. [all data]

Sidorov, Nikitin, et al., 1980
Sidorov, L.N.; Nikitin, M.I.; Skokan, E.V.; Sorokin, I.D., Mass-spectrometric determination of enthalpies of dissociation of gaseous complex fluorides into neutral and charged particles. II. Heats of formation of AlF4- and KF2-, Int. J. Mass Spectrom. Ion Phys., 1980, 35, 203. [all data]

Gusarov, Gorokhov, et al., 1979
Gusarov, A.V.; Gorokhov, L.N.; Pyatenko, A.T.; Sidorova, I.V., Negative ions in the vapors of inorganic compounds, Adv. Mass Spectrom., 1979, 8, 262. [all data]

Nikitin, Skokan, et al., 1979
Nikitin, M.I.; Skokan, E.V.; Sorokin, I.D.; Sidorov, L.N., Sov. Phys. Dokl., 1979, 247, 594. [all data]

Nikitin, Sorokin, et al., 1980
Nikitin, M.I.; Sorokin, I.D.; Skokan, E.V.; Sidorov, L.N., Negative Ions in the Saturated Vapors of the Potassium Fluoride - Hafnium Tetrafluoride and Potassium Fluoride - Beryllium Difluoride Systems, Russ. J. Phys. Chem., 1980, 54, page]. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, References