Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

iron difluoride


Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, 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
Deltafgas-389.53kJ/molReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
gas,1 bar265.19J/mol*KReviewChase, 1998Data last reviewed in September, 1965

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. - 6000.
A 62.73657
B 2.239336
C -0.646198
D 0.050511
E 1.021960
F -407.1086
G 340.4655
H -389.5304
ReferenceChase, 1998
Comment Data last reviewed in September, 1965

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, 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
Deltafliquid-674.55kJ/molReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
liquid,1 bar92.54J/mol*KReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
Deltafsolid-705.84kJ/molReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
solid86.95J/mol*KReviewChase, 1998Data last reviewed in September, 1965

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.

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

View table.

Temperature (K) 1373. - 3000.
A 98.32400
B 2.199027×10-10
C -1.201491×10-10
D 2.045362×10-11
E 7.122801×10-12
F -703.8660
G 211.5246
H -674.5487
ReferenceChase, 1998
Comment Data last reviewed in September, 1965

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.

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

View table.

Temperature (K) 298. - 1373.
A 61.53451
B 39.87026
C -23.89562
D 4.905782
E -0.297405
F -726.7650
G 148.8768
H -705.8408
ReferenceChase, 1998
Comment Data last reviewed in September, 1965

Phase change data

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

Data compiled by: William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Deltasub271. ± 2.0kJ/molN/ABardi, Brunetti, et al., 1996 
Deltasub270. ± 3.kJ/molN/AZhuravleva, Alikhanyan, et al., 1976See also Bardi, Brunetti, et al., 1996.

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
263. ± 2.01068.TE,MEBardi, Brunetti, et al., 1996Based on data from 958. - 1178. K.
263. ± 3.995.MEZhuravleva, Alikhanyan, et al., 1976Based on data from 848. - 1142. K. See also Bardi, Brunetti, et al., 1996.

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed 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 by: John E. Bartmess

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

(F- bullet 4294967295F2Fe) + F2Fe = F-

By formula: (F- bullet 4294967295F2Fe) + F2Fe = F-

Quantity Value Units Method Reference Comment
Deltar367. ± 15.kJ/molTDAsBoltalina, Borshchevskii, et al., 1992gas phase; Critical review; value altered from reference due to conversion from electron convention to ion convention
Deltar359. ± 11.kJ/molTDEqBorshchevskii, Boltalina, et al., 1988gas phase; Fluoride Affinity: FeF2 < FeF3 by 22.6±2.6 kcal/mol.; value altered from reference due to conversion from electron convention to ion convention
Deltar374. ± 17.kJ/molTDEqKuznetsov, Korobov, et al., 1986gas phase; value altered from reference due to conversion from electron convention to ion convention
Deltar359. ± 8.8kJ/molTDEqSidirov, Borshchevsky, et al., 1986gas phase; Corrections to Sorokin, Sidorov, et al., 1981, better neutral pressure determination; value altered from reference due to conversion from electron convention to ion convention
Deltar441. ± 14.kJ/molTDEqSorokin, Sidorov, et al., 1981gas phase; Fluoride Affinity: 15.3±1.2 kcal < AlF3; value altered from reference due to conversion from electron convention to ion convention

F3Fe- + F2Fe = F5Fe2-

By formula: F3Fe- + F2Fe = F5Fe2-

Quantity Value Units Method Reference Comment
Deltar202. ± 37.kJ/molTDEqSidirov, Borshchevsky, et al., 1986gas phase; value altered from reference due to conversion from electron convention to ion convention
Deltar201. ± 4.2kJ/molTDAsSorokin, Sidorov, et al., 1981gas phase; «DELTA»Hf(A-) at 0 K; value altered from reference due to conversion from electron convention to ion convention

References

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

Bardi, Brunetti, et al., 1996
Bardi, Gianpiero; Brunetti, Bruno; Piacente, Vincenzo, Vapor Pressure and Standard Enthalpies of Sublimation of Iron Difluoride, Iron Dichloride, and Iron Dibromide, J. Chem. Eng. Data, 1996, 41, 1, 14-20, https://doi.org/10.1021/je950115w . [all data]

Zhuravleva, Alikhanyan, et al., 1976
Zhuravleva, L.V.; Alikhanyan, A.S.; Sidorov, L.N., Russ. J. Phys. Chem., 1976, 50, 818. [all data]

Boltalina, Borshchevskii, et al., 1992
Boltalina, O.V.; Borshchevskii, A.Y.; Sidorov, L.N., Thermochemistry of 3d Elements Fluorides and Their Negative Ions in Gas Phase, Russ. J. Phys. Chem., 1992, 66, 1223. [all data]

Borshchevskii, Boltalina, et al., 1988
Borshchevskii, A.Ya.; Boltalina, O.V.; Sorokin, I.D.; Sidorov, L.N., Thermochemical Quantities for Gas Phase Iron, Uranium, and Molybdenum Fluorides, and Their Negative Ions., J. Chem. Thermodyn., 1988, 20, 5, 523, https://doi.org/10.1016/0021-9614(88)90080-8 . [all data]

Kuznetsov, Korobov, et al., 1986
Kuznetsov, S.V.; Korobov, M.V.; Savinova, L.N.; Sidirov, L.N., Enthalpy of the addition of the F- ion to copper and iron difluorides, Russ. J. Phys. Chem., 1986, 60, 766. [all data]

Sidirov, Borshchevsky, et al., 1986
Sidirov, L.N.; Borshchevsky, A.Ya.; Boltalina, O.V.; Sorokin, I.D.; Skokan, E.V., Electron affinities of gaseous iron fluorides and dimers, Int. J. Mass Spectrom. Ion Processes, 1986, 73, 1. [all data]

Sorokin, Sidorov, et al., 1981
Sorokin, I.D.; Sidorov, L.N.; Nikitin, M.I.; Skokan, E.V., Mass-spectrometric determination of the enthalpies of dissociation of gaseous complex fluorides into neutral and charged particles. V. Heats of formation of FeF3- and FeF4-, Int. J. Mass Spectrom. Ion Phys., 1981, 41, 45. [all data]


Notes

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