chromium dioxide
- Formula: CrO2
- Molecular weight: 83.9949
- IUPAC Standard InChI: InChI=1S/Cr.2O/q+4;2*-2
- IUPAC Standard InChIKey: IAQWMWUKBQPOIY-UHFFFAOYSA-N
- CAS Registry Number: 12018-01-8
- Chemical structure:
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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) | 298. - 1100. | 1100. - 6000. |
|---|---|---|
| A | 6.686329 | 13.82870 |
| B | 16.75240 | 0.045478 |
| C | -14.95620 | -0.009165 |
| D | 4.775569 | 0.000632 |
| E | -0.009828 | -0.616162 |
| F | -20.64870 | -23.83240 |
| G | 68.01341 | 78.53540 |
| H | -18.00000 | -18.00000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1973 | 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) |
|---|---|---|---|---|
| 298. | 10.37 | 64.34 | 64.35 | -0.00 |
| 300. | 10.39 | 64.41 | 64.35 | 0.02 |
| 400. | 11.24 | 67.52 | 64.77 | 1.10 |
| 500. | 11.88 | 70.10 | 65.58 | 2.26 |
| 600. | 12.36 | 72.31 | 66.53 | 3.47 |
| 700. | 12.70 | 74.25 | 67.49 | 4.73 |
| 800. | 12.95 | 75.96 | 68.45 | 6.01 |
| 900. | 13.12 | 77.50 | 69.37 | 7.31 |
| 1000. | 13.25 | 78.88 | 70.25 | 8.63 |
| 1100. | 13.37 | 80.15 | 71.10 | 9.96 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 1100. | 13.36 | 80.15 | 71.10 | 9.96 |
| 1200. | 13.44 | 81.32 | 71.90 | 11.30 |
| 1300. | 13.51 | 82.40 | 72.67 | 12.65 |
| 1400. | 13.56 | 83.40 | 73.40 | 14.00 |
| 1500. | 13.60 | 84.34 | 74.10 | 15.36 |
| 1600. | 13.64 | 85.22 | 74.76 | 16.73 |
| 1700. | 13.67 | 86.05 | 75.40 | 18.09 |
| 1800. | 13.69 | 86.83 | 76.02 | 19.46 |
| 1900. | 13.72 | 87.57 | 76.61 | 20.83 |
| 2000. | 13.73 | 88.27 | 77.17 | 22.20 |
| 2100. | 13.75 | 88.94 | 77.72 | 23.58 |
| 2200. | 13.76 | 89.58 | 78.24 | 24.95 |
| 2300. | 13.78 | 90.19 | 78.75 | 26.33 |
| 2400. | 13.79 | 90.78 | 79.24 | 27.71 |
| 2500. | 13.80 | 91.34 | 79.71 | 29.09 |
| 2600. | 13.80 | 91.89 | 80.17 | 30.47 |
| 2700. | 13.81 | 92.41 | 80.61 | 31.85 |
| 2800. | 13.82 | 92.91 | 81.04 | 33.23 |
| 2900. | 13.83 | 93.39 | 81.46 | 34.61 |
| 3000. | 13.83 | 93.86 | 81.86 | 35.99 |
| 3100. | 13.84 | 94.32 | 82.26 | 37.38 |
| 3200. | 13.84 | 94.76 | 82.64 | 38.76 |
| 3300. | 13.85 | 95.18 | 83.02 | 40.15 |
| 3400. | 13.85 | 95.60 | 83.38 | 41.53 |
| 3500. | 13.85 | 96.00 | 83.74 | 42.92 |
| 3600. | 13.86 | 96.39 | 84.08 | 44.30 |
| 3700. | 13.86 | 96.77 | 84.42 | 45.69 |
| 3800. | 13.86 | 97.14 | 84.75 | 47.07 |
| 3900. | 13.86 | 97.50 | 85.07 | 48.46 |
| 4000. | 13.87 | 97.85 | 85.39 | 49.85 |
| 4100. | 13.87 | 98.19 | 85.69 | 51.23 |
| 4200. | 13.87 | 98.52 | 86.00 | 52.62 |
| 4300. | 13.87 | 98.85 | 86.29 | 54.01 |
| 4400. | 13.87 | 99.17 | 86.58 | 55.39 |
| 4500. | 13.87 | 99.48 | 86.86 | 56.78 |
| 4600. | 13.88 | 99.79 | 87.14 | 58.17 |
| 4700. | 13.88 | 100.1 | 87.41 | 59.56 |
| 4800. | 13.88 | 100.4 | 87.68 | 60.94 |
| 4900. | 13.88 | 100.7 | 87.94 | 62.33 |
| 5000. | 13.88 | 100.9 | 88.20 | 63.72 |
| 5100. | 13.88 | 101.2 | 88.45 | 65.11 |
| 5200. | 13.88 | 101.5 | 88.70 | 66.50 |
| 5300. | 13.88 | 101.8 | 88.94 | 67.88 |
| 5400. | 13.89 | 102.0 | 89.18 | 69.27 |
| 5500. | 13.89 | 102.3 | 89.42 | 70.66 |
| 5600. | 13.89 | 102.5 | 89.65 | 72.05 |
| 5700. | 13.89 | 102.8 | 89.88 | 73.44 |
| 5800. | 13.89 | 103.0 | 90.10 | 74.83 |
| 5900. | 13.89 | 103.2 | 90.32 | 76.22 |
| 6000. | 13.89 | 103.5 | 90.54 | 77.61 |
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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