dipotassium peroxide
- Formula: K2O2
- Molecular weight: 110.1954
- CAS Registry Number: 17014-71-0
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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 | -495.80 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1963 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 112.93 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 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. - 2000. |
|---|---|
| A | 79.12488 |
| B | 76.60193 |
| C | -11.12103 |
| D | 2.370906 |
| E | -0.079668 |
| F | -522.9833 |
| G | 185.8709 |
| H | -495.8040 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in September, 1963 |
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 as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| ~5. | EI | Gusarov and Gorokhov, 1966 | RDSH |
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: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| b2u | 5 | 433.0 | Ar | IR | Andrews, 1971 | ||
References
Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics 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]
Gusarov and Gorokhov, 1966
Gusarov, A.V.; Gorokhov, L.N.,
Vapor composition over potassium oxide,
Teplofiz. Vysokikh Temperatur, 1966, 4, 590, In original 558. [all data]
Andrews, 1971
Andrews, L.,
Matrix Reactions of K and Rb Atoms with Oxygen Molecules,
J. Chem. Phys., 1971, 54, 11, 4935, https://doi.org/10.1063/1.1674772
. [all data]
Notes
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- 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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