Sodium superoxide
- Formula: NaO2
- Molecular weight: 54.9886
- CAS Registry Number: 12034-12-7
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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 (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 2000. |
|---|---|
| A | 13.73920 |
| B | 11.20140 |
| C | -1.066881 |
| D | 0.248419 |
| E | 0.022868 |
| F | -66.80751 |
| G | 41.16489 |
| H | -62.30000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1963 |
| 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. | 17.25 | 27.70 | 27.70 | -0.00 |
| 300. | 17.26 | 27.81 | 27.70 | 0.03 |
| 400. | 18.21 | 32.90 | 28.39 | 1.81 |
| 500. | 19.20 | 37.07 | 29.72 | 3.68 |
| 600. | 20.19 | 40.66 | 31.25 | 5.65 |
| 700. | 21.19 | 43.85 | 32.83 | 7.71 |
| 800. | 22.18 | 46.74 | 34.39 | 9.88 |
| 900. | 23.17 | 49.41 | 35.91 | 12.15 |
| 1000. | 24.15 | 51.90 | 37.39 | 14.52 |
| 1100. | 25.12 | 54.25 | 38.82 | 16.98 |
| 1200. | 26.09 | 56.48 | 40.20 | 19.54 |
| 1300. | 27.06 | 58.61 | 41.53 | 22.20 |
| 1400. | 28.02 | 60.65 | 42.82 | 24.95 |
| 1500. | 28.99 | 62.61 | 44.08 | 27.80 |
| 1600. | 29.96 | 64.51 | 45.30 | 30.75 |
| 1700. | 30.93 | 66.36 | 46.48 | 33.79 |
| 1800. | 31.90 | 68.15 | 47.63 | 36.93 |
| 1900. | 32.88 | 69.91 | 48.76 | 40.17 |
| 2000. | 33.87 | 71.62 | 49.86 | 43.51 |
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
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