Disodium
- Formula: Na2
- Molecular weight: 45.97953856
- IUPAC Standard InChI: InChI=1S/2Na
- IUPAC Standard InChIKey: QXNVGIXVLWOKEQ-UHFFFAOYSA-N
- CAS Registry Number: 25681-79-2
- 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 (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. - 1400. | 1400. - 2800. | 2800. - 6000. |
|---|---|---|---|
| A | 35.87178 | 93.03250 | -494.8500 |
| B | 4.131470 | -44.01861 | 231.3329 |
| C | 3.093311 | 7.524129 | -33.68187 |
| D | -3.803303 | 0.301394 | 1.599719 |
| E | 0.028058 | -18.89289 | 856.9041 |
| F | 131.2655 | 76.91238 | 1237.970 |
| G | 272.4780 | 307.7273 | 349.9247 |
| H | 142.0702 | 142.0702 | 142.0702 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1983 | Data last reviewed in December, 1983 | Data last reviewed in December, 1983 |
| 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. | 37.59 | 230.2 | 230.2 | -0.01 |
| 300. | 37.60 | 230.5 | 230.2 | 0.07 |
| 400. | 37.95 | 241.3 | 231.7 | 3.85 |
| 500. | 38.35 | 249.9 | 234.5 | 7.66 |
| 600. | 38.72 | 256.9 | 237.7 | 11.51 |
| 700. | 39.03 | 262.9 | 240.9 | 15.40 |
| 800. | 39.25 | 268.1 | 243.9 | 19.32 |
| 900. | 39.36 | 272.7 | 246.9 | 23.25 |
| 1000. | 39.32 | 276.9 | 249.7 | 27.19 |
| 1100. | 39.12 | 280.6 | 252.3 | 31.11 |
| 1200. | 38.73 | 284.0 | 254.8 | 35.00 |
| 1300. | 38.13 | 287.1 | 257.2 | 38.85 |
| 1400. | 37.30 | 289.9 | 259.4 | 42.62 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 1400. | 37.34 | 289.9 | 259.4 | 42.62 |
| 1500. | 36.55 | 292.4 | 261.5 | 46.31 |
| 1600. | 35.72 | 294.8 | 263.6 | 49.93 |
| 1700. | 34.89 | 296.9 | 265.5 | 53.46 |
| 1800. | 34.10 | 298.9 | 267.3 | 56.90 |
| 1900. | 33.39 | 300.7 | 269.0 | 60.28 |
| 2000. | 32.78 | 302.4 | 270.6 | 63.59 |
| 2100. | 32.28 | 304.0 | 272.1 | 66.84 |
| 2200. | 31.91 | 305.5 | 273.6 | 70.05 |
| 2300. | 31.69 | 306.9 | 275.0 | 73.23 |
| 2400. | 31.61 | 308.2 | 276.4 | 76.39 |
| 2500. | 31.70 | 309.5 | 277.7 | 79.55 |
| 2600. | 31.95 | 310.8 | 278.9 | 82.73 |
| 2700. | 32.37 | 312.0 | 280.1 | 85.95 |
| 2800. | 32.98 | 313.2 | 281.3 | 89.22 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 2800. | 33.23 | 313.2 | 281.3 | 89.23 |
| 2900. | 33.66 | 314.3 | 282.4 | 92.57 |
| 3000. | 34.42 | 315.5 | 283.5 | 95.97 |
| 3100. | 35.42 | 316.6 | 284.6 | 99.46 |
| 3200. | 36.61 | 317.8 | 285.6 | 103.1 |
| 3300. | 37.93 | 318.9 | 286.6 | 106.8 |
| 3400. | 39.32 | 320.1 | 287.5 | 110.6 |
| 3500. | 40.75 | 321.2 | 288.5 | 114.7 |
| 3600. | 42.19 | 322.4 | 289.4 | 118.8 |
| 3700. | 43.60 | 323.6 | 290.3 | 123.1 |
| 3800. | 44.97 | 324.8 | 291.2 | 127.5 |
| 3900. | 46.28 | 326.0 | 292.1 | 132.1 |
| 4000. | 47.51 | 327.1 | 292.9 | 136.8 |
| 4100. | 48.65 | 328.3 | 293.8 | 141.6 |
| 4200. | 49.70 | 329.5 | 294.6 | 146.5 |
| 4300. | 50.64 | 330.7 | 295.5 | 151.5 |
| 4400. | 51.47 | 331.9 | 296.3 | 156.6 |
| 4500. | 52.18 | 333.0 | 297.1 | 161.8 |
| 4600. | 52.78 | 334.2 | 297.9 | 167.1 |
| 4700. | 53.26 | 335.3 | 298.7 | 172.4 |
| 4800. | 53.63 | 336.5 | 299.4 | 177.7 |
| 4900. | 53.87 | 337.6 | 300.2 | 183.1 |
| 5000. | 54.01 | 338.7 | 301.0 | 188.5 |
| 5100. | 54.03 | 339.7 | 301.7 | 193.9 |
| 5200. | 53.95 | 340.8 | 302.4 | 199.3 |
| 5300. | 53.76 | 341.8 | 303.2 | 204.7 |
| 5400. | 53.47 | 342.8 | 303.9 | 210.0 |
| 5500. | 53.09 | 343.8 | 304.6 | 215.4 |
| 5600. | 52.61 | 344.7 | 305.3 | 220.6 |
| 5700. | 52.05 | 345.7 | 306.0 | 225.9 |
| 5800. | 51.42 | 346.6 | 306.7 | 231.0 |
| 5900. | 50.71 | 347.4 | 307.4 | 236.2 |
| 6000. | 49.94 | 348.3 | 308.1 | 241.2 |
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
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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