disodium sulphide
- Formula: Na2S
- Molecular weight: 78.045
- CAS Registry Number: 1313-82-2
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Liquid Phase Heat Capacity (Shomate Equation)
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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) | 1445. - 3000. |
|---|---|
| A | 92.04800 |
| B | -0.000046 |
| C | 0.000018 |
| D | -0.000002 |
| E | -0.000011 |
| F | -354.3040 |
| G | 232.8260 |
| H | -323.9400 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1978 |
| Temperature (K) |
Cp (J/mol*K) |
S° (J/mol*K) |
-(G° - H°298.15)/T (J/mol*K) |
H° - H°298.15 (kJ/mol) |
|---|---|---|---|---|
| 1445. | 92.05 | 266.7 | 195.7 | 102.6 |
| 1500. | 92.05 | 270.1 | 198.3 | 107.7 |
| 1600. | 92.05 | 276.1 | 203.0 | 116.9 |
| 1700. | 92.05 | 281.7 | 207.5 | 126.1 |
| 1800. | 92.05 | 286.9 | 211.8 | 135.3 |
| 1900. | 92.05 | 291.9 | 215.8 | 144.5 |
| 2000. | 92.05 | 296.6 | 219.8 | 153.7 |
| 2100. | 92.05 | 301.1 | 223.5 | 162.9 |
| 2200. | 92.05 | 305.4 | 227.2 | 172.1 |
| 2300. | 92.05 | 309.5 | 230.6 | 181.3 |
| 2400. | 92.05 | 313.4 | 234.0 | 190.6 |
| 2500. | 92.05 | 317.2 | 237.3 | 199.8 |
| 2600. | 92.05 | 320.8 | 240.4 | 209.0 |
| 2700. | 92.05 | 324.3 | 243.5 | 218.2 |
| 2800. | 92.05 | 327.6 | 246.4 | 227.4 |
| 2900. | 92.05 | 330.8 | 249.3 | 236.6 |
| 3000. | 92.05 | 334.0 | 252.0 | 245.8 |
References
Go To: Top, Liquid 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, Liquid Phase Heat Capacity (Shomate Equation), References
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