beryllium oxide


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
Δfgas136.40kJ/molReviewChase, 1998Data last reviewed in June, 1975
Quantity Value Units Method Reference Comment
gas,1 bar197.63J/mol*KReviewChase, 1998Data last reviewed in June, 1975

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) 5000. to 6000.
A 276.3470
B -79.40290
C 9.964611
D -0.439391
E -515.6630
F -472.1220
G 149.9360
H 136.3980
ReferenceChase, 1998
Comment Data last reviewed in June, 1975

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-542.71kJ/molReviewChase, 1998Data last reviewed in June, 1975
Quantity Value Units Method Reference Comment
liquid,1 bar35.86J/mol*KReviewChase, 1998Data last reviewed in June, 1975
Quantity Value Units Method Reference Comment
Δfsolid-609.4 ± 2.5kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Δfsolid-608.35kJ/molReviewChase, 1998α phase; Data last reviewed in June, 1975
Quantity Value Units Method Reference Comment
solid,1 bar13.77 ± 0.04J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value

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) 2780. to 5000.
A 79.49600
B 7.057823×10-8
C -1.617753×10-8
D 1.275735×10-9
E 9.949218×10-8
F -616.9559
G 66.38334
H -542.7066
ReferenceChase, 1998
Comment Data last reviewed in June, 1975

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 800.800. to 2780.298. to 1500.1500. to 2780.
A 3.35897447.0620524.6897848.35281
B 131.59225.59835952.563174.393033
C -140.4937-0.495570-36.35239-0.090144
D 56.209530.0545279.4879320.007823
E -0.536669-2.947373-1.053896-3.469105
F -615.8764-631.6794-614.6045-626.3113
G -18.6788454.7647926.3598358.35048
H -608.3536-608.3536-601.6592-601.6592
ReferenceChase, 1998Chase, 1998Chase, 1998Chase, 1998
Comment α phase; Data last reviewed in June, 1975 α phase; Data last reviewed in June, 1975 β phase; Data last reviewed in June, 1975 β phase; Data last reviewed in June, 1975

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 by: Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

IE (eV) Method Reference
10.1 ± 0.4EITheard and Hildenbrand, 1964
10.4EIChupka, Berkowitz, et al., 1959

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]

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Theard and Hildenbrand, 1964
Theard, L.P.; Hildenbrand, D.L., Heat of formation of Be2O(g) by mass spectrometry, J. Chem. Phys., 1964, 41, 3416. [all data]

Chupka, Berkowitz, et al., 1959
Chupka, W.A.; Berkowitz, J.; Giese, C.F., Vaporization of beryllium oxide and its reaction with tungsten, J. Chem. Phys., 1959, 30, 827. [all data]


Notes

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