disodium wolframate
- Formula: Na2O4W
- Molecular weight: 293.82
- IUPAC Standard InChI: InChI=1S/2Na.4O.W/q2*+1;;;2*-1;
- IUPAC Standard InChIKey: XMVONEAAOPAGAO-UHFFFAOYSA-N
- CAS Registry Number: 13472-45-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Sodium tungsten oxide
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Condensed phase thermochemistry data
Go To: Top, 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 | -369.199 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 38.327 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1967 |
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 861. | 862. to 1500. |
|---|---|---|
| A | 29.71534 | 33.78107 |
| B | 24.03513 | 11.24259 |
| C | -3.624618 | 10.18968 |
| D | 2.630259 | -2.601004 |
| E | -0.286190 | -0.208561 |
| F | -380.0598 | -372.5932 |
| G | 65.64866 | 83.02247 |
| H | -369.1993 | -369.1993 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1967 | Data last reviewed in June, 1967 |
References
Go To: Top, Condensed phase thermochemistry 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]
Notes
Go To: Top, Condensed phase thermochemistry data, 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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