disodium oxide
- Formula: Na2O
- Molecular weight: 61.9789
- IUPAC Standard InChI: InChI=1S/2Na.O
- IUPAC Standard InChIKey: QVUYWFOHKOTLOB-UHFFFAOYSA-N
- CAS Registry Number: 1313-59-3
- Chemical structure:
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Condensed phase thermochemistry data
Go To: Top, 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -372.84 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 91.61 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -417.98 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 75.04 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1968 |
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) | 1405.2 to 3000. |
|---|---|
| A | 104.6000 |
| B | 9.909135×10-10 |
| C | -6.022074×10-10 |
| D | 1.113058×10-10 |
| E | 2.362827×10-11 |
| F | -404.0296 |
| G | 218.1902 |
| H | -372.8434 |
| Reference | Chase, 1998 |
| Comment | 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 (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 1023. | 1023. to 1243. | 1243. to 1405. |
|---|---|---|---|
| A | 25.57540 | -125.7730 | 2240.950 |
| B | 177.7100 | 302.0740 | -3209.970 |
| C | -166.3350 | -140.6420 | 1803.690 |
| D | 57.61160 | 21.32400 | -359.0730 |
| E | 0.338149 | 38.28310 | -386.2480 |
| F | -431.0160 | -301.6530 | -1877.630 |
| G | 61.79400 | -42.66700 | 2421.660 |
| H | -417.9820 | -417.9820 | -417.9820 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1968 | Data last reviewed in June, 1968 | Data last reviewed in June, 1968 |
Gas phase ion energetics data
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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Proton affinity (review) | 1375.9 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 1345.2 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 5.35 | S | Butman, Kudin, et al., 1984 | LBLHLM |
| 5.1 ± 0.1 | PI | Peterson, Dao, et al., 1983 | LBLHLM |
| 5.5 ± 0.5 | EI | Hildenbrand and Murad, 1970 | RDSH |
References
Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, 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]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [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]
Peterson, Dao, et al., 1983
Peterson, K.I.; Dao, P.D.; Castleman, A.W., Jr.,
Photoionization studies of Na2Cl and Na2O and reactions of metal clusters,
J. Chem. Phys., 1983, 79, 777. [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]
Notes
Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°liquid Enthalpy of formation of liquid 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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