niobium oxide
- Formula: NbO
- Molecular weight: 108.9058
- IUPAC Standard InChI: InChI=1S/Nb.O
- IUPAC Standard InChIKey: BFRGSJVXBIWTCF-UHFFFAOYSA-N
- CAS Registry Number: 12034-57-0
- 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 monoxide
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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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 3000. to 6000. |
|---|---|
| A | 8.540225 |
| B | 0.191408 |
| C | 0.005594 |
| D | 0.004413 |
| E | -0.122152 |
| F | 44.52940 |
| G | 66.68212 |
| H | 47.50000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1973 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 3000. | 9.27 | 76.71 | 68.81 | 23.69 |
| 3100. | 9.31 | 77.01 | 69.07 | 24.62 |
| 3200. | 9.34 | 77.31 | 69.33 | 25.55 |
| 3300. | 9.38 | 77.60 | 69.57 | 26.49 |
| 3400. | 9.42 | 77.88 | 69.81 | 27.43 |
| 3500. | 9.46 | 78.15 | 70.05 | 28.37 |
| 3600. | 9.50 | 78.42 | 70.28 | 29.32 |
| 3700. | 9.54 | 78.68 | 70.50 | 30.27 |
| 3800. | 9.58 | 78.94 | 70.72 | 31.23 |
| 3900. | 9.63 | 79.19 | 70.93 | 32.19 |
| 4000. | 9.67 | 79.43 | 71.14 | 33.15 |
| 4100. | 9.72 | 79.67 | 71.35 | 34.12 |
| 4200. | 9.76 | 79.90 | 71.55 | 35.10 |
| 4300. | 9.81 | 80.13 | 71.74 | 36.08 |
| 4400. | 9.86 | 80.36 | 71.94 | 37.06 |
| 4500. | 9.91 | 80.58 | 72.13 | 38.05 |
| 4600. | 9.96 | 80.80 | 72.31 | 39.04 |
| 4700. | 10.02 | 81.02 | 72.50 | 40.04 |
| 4800. | 10.07 | 81.23 | 72.68 | 41.04 |
| 4900. | 10.13 | 81.44 | 72.85 | 42.05 |
| 5000. | 10.18 | 81.64 | 73.03 | 43.07 |
| 5100. | 10.24 | 81.84 | 73.20 | 44.09 |
| 5200. | 10.30 | 82.04 | 73.37 | 45.12 |
| 5300. | 10.36 | 82.24 | 73.53 | 46.15 |
| 5400. | 10.43 | 82.43 | 73.69 | 47.19 |
| 5500. | 10.49 | 82.63 | 73.85 | 48.24 |
| 5600. | 10.56 | 82.81 | 74.01 | 49.29 |
| 5700. | 10.63 | 83.00 | 74.17 | 50.35 |
| 5800. | 10.70 | 83.19 | 74.32 | 51.42 |
| 5900. | 10.77 | 83.37 | 74.47 | 52.49 |
| 6000. | 10.84 | 83.55 | 74.62 | 53.57 |
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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