barium oxide, obtained by calcining witherite


Gas phase thermochemistry data

Go To: Top, Gas phase ion energetics 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-123.85kJ/molReviewChase, 1998Data last reviewed in June, 1974
Quantity Value Units Method Reference Comment
gas,1 bar235.45J/mol*KReviewChase, 1998Data last reviewed in June, 1974

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) 5000. to 6000.
A -1251.230
B 506.9240
C -68.96210
D 3.194891
E 2905.900
F 2971.970
G 616.0870
H -123.8460
ReferenceChase, 1998
Comment Data last reviewed in June, 1974

Gas phase ion energetics data

Go To: Top, Gas 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 - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to BaO+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)6.46 ± 0.07eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)1215.4kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity1187.6kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
6.91EIKoitabashi, 1994LL
6.5 ± 0.15EVALBelyaev, Gotkis, et al., 1990LL
6.46 ± 0.07PEDyke, Feher, et al., 1987LBLHLM
6.8 ± 0.2EIMurad, 1981LLK
6.9 ± 0.1EIRauh and Ackermann, 1976LLK
6.5 ± 0.2EIHilpert, Naoumidis, et al., 1975LLK
7. ± 1.EIFarber and Srivastava, 1975LLK
6.97 ± 0.12EIPanchenkov, Gusarov, et al., 1973LLK
6.8 ± 0.5EIPupp, Yamdagni, et al., 1969RDSH
6.5 ± 0.3EIMesnard, Uzan, et al., 1963RDSH
6.89 ± 0.03PEDyke, Feher, et al., 1987Vertical value; LBLHLM

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
Ba+~11.OEIKoitabashi, 1994LL
Ba+10.95 ± 0.18OEIPanchenkov, Gusarov, et al., 1973LLK
Ba+13.7 ± 0.5OEIMesnard, Uzan, et al., 1966RDSH
Ba+13.2 ± 0.2OEIMesnard, Uzan, et al., 1963RDSH

References

Go To: Top, Gas 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]

Koitabashi, 1994
Koitabashi, M., Mass spectrum of barium oxide vapor, Jpn. J. Appl. Phys., 1994, 33, 5995. [all data]

Belyaev, Gotkis, et al., 1990
Belyaev, V.N.; Gotkis, I.S.; Lebedeva, N.L.; Krasnov, K.S., Ionization potentials of MX molecules (M = Ca, Sr, Ba; X = F, Cl, Br, I, OH, O), Russ. J. Phys. Chem., 1990, 64, 773. [all data]

Dyke, Feher, et al., 1987
Dyke, J.M.; Feher, M.; Gravenor, B.W.J.; Morris, A., High-temperature photoelectron spectroscopy: A study of the alkaline earth oxides SrO and BaO, J. Phys. Chem., 1987, 91, 4476. [all data]

Murad, 1981
Murad, E., Thermochemical properties of the gaseous alkaline earth monohydroxides, J. Chem. Phys., 1981, 75, 4080. [all data]

Rauh and Ackermann, 1976
Rauh, E.G.; Ackermann, R.J., Erratum: First ionization potentials of some refractory oxide vapors, J. Chem. Phys., 1976, 64, 1862. [all data]

Hilpert, Naoumidis, et al., 1975
Hilpert, K.; Naoumidis, A.; Wolff, G., Mass spectrometric study of the evaporation of BaAl2O4, High Temp. Sci., 1975, 7, 1. [all data]

Farber and Srivastava, 1975
Farber, M.; Srivastava, R.D., The dissociation energy of barium oxide, High Temp. Sci., 1975, 7, 74. [all data]

Panchenkov, Gusarov, et al., 1973
Panchenkov, I.G.; Gusarov, A.V.; Gorokhov, L.N., Dissociation energy of the barium oxide molecule, Russ. J. Phys. Chem., 1973, 47, 55. [all data]

Pupp, Yamdagni, et al., 1969
Pupp, C.; Yamdagni, R.; Porter, R.F., Mass spectrometric study of the evaporation of BaMoO4 and BaWO4, J. Inorg. Nucl. Chem., 1969, 31, 2021. [all data]

Mesnard, Uzan, et al., 1963
Mesnard, G.; Uzan, R.; Cabaud, B., Potentiels d'apparition des ions obtenus dans un spectrometre de masse a partir d'oxydes alcalino-terreux, Cahiers Phys., 1963, 17, 333. [all data]

Mesnard, Uzan, et al., 1966
Mesnard, G.; Uzan, R.; Cabaud, B., Etude au spectrometre de masse des produits d'evaporation du bioxyde de titane et du titanate de baryum, Rev. Phys. Appl., 1966, 1, 123. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References