niobium dioxide
- Formula: NbO2
- Molecular weight: 124.9052
- IUPAC Standard InChI: InChI=1S/Nb.2O/q+4;2*-2
- IUPAC Standard InChIKey: BJDGBXPQVFSQOZ-UHFFFAOYSA-N
- CAS Registry Number: 12034-59-2
- 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: Niobium(iv) oxide
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Gas 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) | 3000. - 6000. |
|---|---|
| A | 52.84280 |
| B | 4.543880 |
| C | -1.230591 |
| D | 0.105124 |
| E | -0.973563 |
| F | -219.2420 |
| G | 329.9540 |
| H | -199.9950 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1973 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 3000. | 58.13 | 397.1 | 346.7 | 151.1 |
| 3100. | 58.13 | 399.0 | 348.4 | 156.9 |
| 3200. | 58.13 | 400.9 | 350.0 | 162.7 |
| 3300. | 58.12 | 402.6 | 351.6 | 168.5 |
| 3400. | 58.11 | 404.4 | 353.1 | 174.4 |
| 3500. | 58.10 | 406.1 | 354.6 | 180.2 |
| 3600. | 58.08 | 407.7 | 356.0 | 186.0 |
| 3700. | 58.06 | 409.3 | 357.5 | 191.8 |
| 3800. | 58.04 | 410.8 | 358.8 | 197.6 |
| 3900. | 58.02 | 412.3 | 360.2 | 203.4 |
| 4000. | 58.00 | 413.8 | 361.5 | 209.2 |
| 4100. | 57.97 | 415.2 | 362.8 | 215.0 |
| 4200. | 57.95 | 416.6 | 364.1 | 220.8 |
| 4300. | 57.93 | 418.0 | 365.3 | 226.6 |
| 4400. | 57.92 | 419.3 | 366.5 | 232.4 |
| 4500. | 57.90 | 420.6 | 367.7 | 238.2 |
| 4600. | 57.89 | 421.9 | 368.9 | 244.0 |
| 4700. | 57.89 | 423.2 | 370.0 | 249.7 |
| 4800. | 57.88 | 424.4 | 371.1 | 255.5 |
| 4900. | 57.89 | 425.6 | 372.2 | 261.3 |
| 5000. | 57.90 | 426.7 | 373.3 | 267.1 |
| 5100. | 57.92 | 427.9 | 374.4 | 272.9 |
| 5200. | 57.94 | 429.0 | 375.4 | 278.7 |
| 5300. | 57.97 | 430.1 | 376.4 | 284.5 |
| 5400. | 58.02 | 431.2 | 377.4 | 290.3 |
| 5500. | 58.07 | 432.3 | 378.4 | 296.1 |
| 5600. | 58.13 | 433.3 | 379.4 | 301.9 |
| 5700. | 58.20 | 434.3 | 380.4 | 307.7 |
| 5800. | 58.28 | 435.4 | 381.3 | 313.5 |
| 5900. | 58.38 | 436.3 | 382.2 | 319.4 |
| 6000. | 58.48 | 437.3 | 383.1 | 325.2 |
References
Go To: Top, Gas 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, Gas Phase Heat Capacity (Shomate Equation), References
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