Sodium hydride
- Formula: HNa
- Molecular weight: 23.99771
- IUPAC Standard InChI: InChI=1S/Na.H
- IUPAC Standard InChIKey: MPMYQQHEHYDOCL-UHFFFAOYSA-N
- CAS Registry Number: 7646-69-7
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, Condensed 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 124.27 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1963 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 188.39 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1963 |
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. to 900. | 900. to 6000. |
|---|---|---|
| A | 18.58252 | 36.93146 |
| B | 44.53408 | 1.254473 |
| C | -40.17540 | -0.061337 |
| D | 13.64716 | 0.004417 |
| E | 0.145980 | -1.442456 |
| F | 117.5629 | 109.3011 |
| G | 200.0835 | 227.0556 |
| H | 124.2652 | 124.2652 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in March, 1963 | Data last reviewed in March, 1963 |
Condensed phase thermochemistry data
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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | -56.44 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1963 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 40.03 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 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 1500. |
|---|---|
| A | 22.24729 |
| B | 71.68112 |
| C | -43.55126 |
| D | 9.435674 |
| E | -0.321076 |
| F | -66.96785 |
| G | 45.62610 |
| H | -56.44216 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1963 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, 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:
B - John E. Bartmess
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Proton affinity (review) | 1095. | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 1070.6 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
De-protonation reactions
Na- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1444.0 ± 2.0 | kJ/mol | D-EA | Patterson, Hotop, et al., 1974 | gas phase; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1423.5 ± 2.4 | kJ/mol | H-TS | Patterson, Hotop, et al., 1974 | gas phase; B |
References
Go To: Top, Gas phase thermochemistry data, 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]
Patterson, Hotop, et al., 1974
Patterson, T.A.; Hotop, H.; Kasdan, A.; Norcross, D.W.; Lineberger, W.C.,
Resonances in Alkali Negative-Ion Photodetachment and Electron Affinities of the Corresponding Neutrals,
Phys. Rev. Lett., 1974, 32, 5, 189, https://doi.org/10.1103/PhysRevLett.32.189
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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