magnesium wolframate, of a kind used as a luminophore
- Formula: MgO4W
- Molecular weight: 272.14
- IUPAC Standard InChI: InChI=1S/Mg.4O.W/q+2;;;2*-1;
- IUPAC Standard InChIKey: DJZHPOJZOWHJPP-UHFFFAOYSA-N
- CAS Registry Number: 13573-11-0
- 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: Magnesium tungsten oxide
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Solid Phase Heat Capacity (Shomate Equation)
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.
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 2000. |
|---|---|
| A | 134.9963 |
| B | 0.042427 |
| C | 28.47563 |
| D | -6.063453 |
| E | -2.508015 |
| F | -1564.808 |
| G | 249.1212 |
| H | -1515.863 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1967 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 298. | 109.1 | 101.0 | 101.2 | -0.06 |
| 300. | 109.5 | 101.8 | 101.2 | 0.16 |
| 400. | 123.5 | 135.4 | 105.7 | 11.90 |
| 500. | 131.3 | 163.9 | 114.6 | 24.67 |
| 600. | 137.0 | 188.4 | 124.9 | 38.09 |
| 700. | 141.8 | 209.8 | 135.5 | 52.04 |
| 800. | 146.2 | 229.1 | 146.0 | 66.44 |
| 900. | 150.6 | 246.5 | 156.2 | 81.28 |
| 1000. | 154.9 | 262.6 | 166.1 | 96.56 |
| 1100. | 159.4 | 277.6 | 175.5 | 112.3 |
| 1200. | 163.8 | 291.7 | 184.6 | 128.4 |
| 1300. | 168.4 | 305.0 | 193.4 | 145.0 |
| 1400. | 173.0 | 317.6 | 201.8 | 162.1 |
| 1500. | 177.6 | 329.7 | 209.9 | 179.6 |
| 1600. | 182.1 | 341.3 | 217.8 | 197.6 |
| 1700. | 186.7 | 352.5 | 225.4 | 216.1 |
| 1800. | 191.2 | 363.3 | 232.7 | 235.0 |
| 1900. | 195.6 | 373.7 | 239.9 | 254.3 |
| 2000. | 199.8 | 383.9 | 246.8 | 274.1 |
References
Go To: Top, Solid Phase Heat Capacity (Shomate Equation), 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, Solid Phase Heat Capacity (Shomate Equation), References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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