disodium oxide
- Formula: Na2O
- Molecular weight: 61.9789
- IUPAC Standard InChI: InChI=1S/2Na.O
- IUPAC Standard InChIKey: QVUYWFOHKOTLOB-UHFFFAOYSA-N
- CAS Registry Number: 1313-59-3
- Chemical structure:
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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. - 1023. | 1023. - 1243. | 1243. - 1405. |
|---|---|---|---|
| A | 25.57540 | -125.7730 | 2240.950 |
| B | 177.7100 | 302.0740 | -3209.970 |
| C | -166.3350 | -140.6420 | 1803.690 |
| D | 57.61160 | 21.32400 | -359.0730 |
| E | 0.338149 | 38.28310 | -386.2480 |
| F | -431.0160 | -301.6530 | -1877.630 |
| G | 61.79400 | -42.66700 | 2421.660 |
| H | -417.9820 | -417.9820 | -417.9820 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1968 | Data last reviewed in June, 1968 | Data last reviewed in June, 1968 |
| 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. | 69.09 | 75.01 | 75.04 | -0.01 |
| 300. | 69.23 | 75.47 | 75.04 | 0.13 |
| 400. | 75.85 | 96.31 | 77.84 | 7.39 |
| 500. | 81.40 | 113.9 | 83.33 | 15.26 |
| 600. | 85.70 | 129.1 | 89.72 | 23.63 |
| 700. | 88.92 | 142.6 | 96.32 | 32.37 |
| 800. | 91.31 | 154.6 | 102.9 | 41.38 |
| 900. | 93.20 | 165.5 | 109.2 | 50.61 |
| 1000. | 94.90 | 175.4 | 115.4 | 60.02 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 1023. | 95.47 | 179.2 | 116.7 | 63.95 |
| 1100. | 96.35 | 186.2 | 121.3 | 71.34 |
| 1200. | 97.62 | 194.6 | 127.1 | 81.04 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 1243. | 98.16 | 207.7 | 129.5 | 97.18 |
| 1300. | 98.79 | 212.1 | 133.0 | 102.8 |
| 1400. | 99.86 | 219.4 | 138.9 | 112.7 |
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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