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sodium oxide


Gas phase thermochemistry data

Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, 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
Deltafgas83.68kJ/molReviewChase, 1998Data last reviewed in December, 1967
Quantity Value Units Method Reference Comment
gas,1 bar229.13J/mol*KReviewChase, 1998Data last reviewed in December, 1967

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) 298. - 6000.
A 37.18409
B 1.032407
C -0.053226
D 0.004539
E -0.211537
F 71.83886
G 272.6286
H 83.68000
ReferenceChase, 1998
Comment Data last reviewed in December, 1967

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, 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:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

IE (eV) Method Reference Comment
7.41SButman, Kudin, et al., 1984LBLHLM
6.5 ± 0.7EIHildenbrand and Murad, 1970RDSH

Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry data, 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.

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through March, 1977

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 23Na16O
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A (2Sigma) (1500) 1 (548) 1   (0.470) 1     (1.95) 1  
X (2Pi) 0 1 (526) 1   (0.425) 1     (2.05) 1  

Notes

1Theoretical results, average of two calculations O'Hare and Wahl, 1972, So and Richards, 1975. The relative term values of the two states are in qualitative agreement with deductions made from a magnetic deflection analysis of the reactive scattering of Na+NO2, see Herm and Herschbach, 1970.
2Thermochemical value [mass-spectrometry Hildenbrand and Murad, 1970, calorimetry O'Hare, 1972).
3From a merging-beam study of the reaction CO+(Na,C)NaO+ Rol, Entemann, et al., 1974. See also O'Hare and Wahl, 1972.

References

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, 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]

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]

Hildenbrand and Murad, 1970
Hildenbrand, D.L.; Murad, E., Dissociation energy of NaO(g) and the heat of atomization of Na2O(g), J. Chem. Phys., 1970, 53, 3403. [all data]

O'Hare and Wahl, 1972
O'Hare, P.A.G.; Wahl, A.C., Thermochemical and theoretical investigations of the sodium-oxygen system. II. Properties of NaO and its ions from Hartree-Fock molecular orbital studies, J. Chem. Phys., 1972, 56, 4516. [all data]

So and Richards, 1975
So, S.P.; Richards, W.G., The electronic ground states of alkali monoxides, Chem. Phys. Lett., 1975, 32, 227. [all data]

Herm and Herschbach, 1970
Herm, R.R.; Herschbach, D.R., Molecular beam kinetics: reactions of alkali atoms with NO2 and CH3NO2, J. Chem. Phys., 1970, 52, 5783. [all data]

O'Hare, 1972
O'Hare, P.A.G., Thermochemical and theoretical investigations of the sodium-oxygen system. I. The standard enthalpy of formation of sodium oxide (Na2O), J. Chem. Phys., 1972, 56, 4513. [all data]

Rol, Entemann, et al., 1974
Rol, P.K.; Entemann, E.A.; Wendell, K.L., Merging beams studies of Na, K, and Mg collisions with atmospheric ions, J. Chem. Phys., 1974, 61, 2050. [all data]


Notes

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