disodium peroxide
- Formula: Na2O2
- Molecular weight: 77.9783
- IUPAC Standard InChI: InChI=1S/2Na.O2/c;;1-2/q2*+1;-2
- IUPAC Standard InChIKey: PFUVRDFDKPNGAV-UHFFFAOYSA-N
- CAS Registry Number: 1313-60-6
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
View 3d structure (requires JavaScript / HTML 5) - Other names: Sodium peroxide
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Condensed phase thermochemistry data
Go To: Top, Vibrational and/or electronic energy levels, 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 |
|---|---|---|---|---|---|
| ΔfH°solid | -122.66 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 22.65 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1968 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 785. | 785. to 2500. |
|---|---|---|
| A | 15.27340 | 27.15010 |
| B | 31.49601 | -4.282630×10-8 |
| C | -29.47591 | 2.128470×10-8 |
| D | 12.11820 | -3.582501×10-9 |
| E | -0.091997 | -5.257371×10-9 |
| F | -128.6880 | -130.4230 |
| G | 32.43150 | 54.72020 |
| H | -122.6600 | -122.6600 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1968 | Data last reviewed in June, 1968 |
Vibrational and/or electronic energy levels
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 compiled by: Marilyn E. Jacox
State: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| b1u | 4 | 239.0 | Ar | IR | Andrews, 1969 | ||
| b2u | 5 | 524.5 | Ar | IR | Andrews, 1969 | ||
| b3u | 6 | 254.0 | Ar | IR | Andrews, 1969 | ||
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, 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
Go To: Top, Condensed phase thermochemistry data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
S°solid Entropy of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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