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dipotassium oxide


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
Deltafsolid-363.17kJ/molReviewChase, 1998Data last reviewed in June, 1963
Quantity Value Units Method Reference Comment
solid94.03J/mol*KReviewChase, 1998Data last reviewed in June, 1963

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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View table.

Temperature (K) 298. - 700.700. - 2000.
A 245.010472.55098
B -567.049241.39097
C 778.7219-0.728497
D -346.26410.218564
E -4.6533610.066026
F -432.8599-386.1610
G 501.8708170.5629
H -363.1712-363.1712
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1963 Data last reviewed in June, 1963

Gas phase ion energetics 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.

Data evaluated as indicated in comments:
HL - E.P. Hunter and S.G. Lias

Data compiled as indicated in comments:
LBLHLM - S.G. Lias, J.E. Bartmess, J.F. Liebman, J.L. Holmes, R.D. Levin, and W.G. Mallard
LLK - S.G. Lias, R.D. Levin, and S.A. Kafafi
RDSH - H.M. Rosenstock, K. Draxl, B.W. Steiner, and J.T. Herron

View reactions leading to K2O+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Proton affinity (review)1342.5kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity1311.8kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
4.7 ± 0.4PIDao, Peterson, et al., 1984LBLHLM
4.96SButman, Kudin, et al., 1984LBLHLM
7.5 ± 1.0SFarber, Srivastava, et al., 1982LBLHLM
10.7 ± 0.3EISimmons, Lowden, et al., 1977LLK
7.5 ± 0.1EIEhlert, 1977LLK
7.5 ± 0.2EIEhlert, 1977LLK
~5.EIGusarov and Gorokhov, 1966RDSH

References

Go To: Top, 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]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Dao, Peterson, et al., 1984
Dao, P.D.; Peterson, K.I.; Castleman, A.W., Jr., The photoionization of oxidized metal clusters, J. Chem. Phys., 1984, 80, 563. [all data]

Butman, Kudin, et al., 1984
Butman, M.F.; Kudin, L.S.; Krasnov, K.S., The Mass-spectrometric determination of the proton affinity of the molecules M2O (M = Na, K, Rb, Cs), Russ. J. Inorg. Chem., 1984, 29, 1228, In original 2150. [all data]

Farber, Srivastava, et al., 1982
Farber, M.; Srivastava, R.D.; Moyer, J.W., Mass spectrometric determination of the thermodynamics of potassium hydroxide and minor potassium-containing species required in magnetohydrodynamic power systems, J. Chem. Thermodyn., 1982, 14, 1103. [all data]

Simmons, Lowden, et al., 1977
Simmons, L.L.; Lowden, L.F.; Ehlert, T.C., A mass spectrometric study of K2CO3 and K2O, J. Phys. Chem., 1977, 81, 706. [all data]

Ehlert, 1977
Ehlert, T.C., Mass spectrometric investigations of the oxides of potassium, High Temp. Sci., 1977, 9, 237. [all data]

Gusarov and Gorokhov, 1966
Gusarov, A.V.; Gorokhov, L.N., Vapor composition over potassium oxide, Teplofiz. Vysokikh Temperatur, 1966, 4, 590, In original 558. [all data]


Notes

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