Sodium superoxide

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
ΔfH°solid-260.66kJ/molReviewChase, 1998Data last reviewed in June, 1963
Quantity Value Units Method Reference Comment
S°solid115.91J/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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Temperature (K) 298. to 2000.
A 57.48481
B 46.86666
C -4.463826
D 1.039386
E 0.095681
F -279.5226
G 172.2339
H -260.6632
ReferenceChase, 1998
Comment Data last reviewed in June, 1963

Vibrational and/or electronic energy levels

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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: Marilyn E. Jacox

State:   ?
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 40000 Ar Andrews, 1976

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
a1 1 OO stretch 1094 Ar Ra Smardzewski and Andrews, 1972
1 OO stretch 1081.0 O2 IR Andrews, 1969
2 ONaO s-stretch 390.7 vs Ar IR Andrews, 1969
2 ONaO s-stretch 306.0 O2 IR Andrews, 1969
b2 3 ONaO a-stretch 332.8 Ar IR Andrews, 1969
3 ONaO a-stretch 259.0 O2 IR Andrews, 1969

Notes

vsVery strong
xEnergy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state.

References

Go To: Top, Condensed phase thermochemistry data, Vibrational and/or electronic energy levels, 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]

Andrews, 1976
Andrews, L., Ultraviolet absorption studies of the alkali metal atom-oxygen molecule matrix reaction, J. Mol. Spectrosc., 1976, 61, 3, 337, https://doi.org/10.1016/0022-2852(76)90324-6 . [all data]

Smardzewski and Andrews, 1972
Smardzewski, R.R.; Andrews, L., Raman Spectra of the Products of Na and K Atom Argon Matrix Reactions with O2 Molecules, J. Chem. Phys., 1972, 57, 3, 1327, https://doi.org/10.1063/1.1678396 . [all data]

Andrews, 1969
Andrews, L., Infrared spectra and bonding in the sodium superoxide and sodium peroxide molecules, J. Phys. Chem., 1969, 73, 11, 3922, https://doi.org/10.1021/j100845a061 . [all data]

Notes

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