disodium sulphide
- Formula: Na2S
- Molecular weight: 78.045
- CAS Registry Number: 1313-82-2
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Condensed phase thermochemistry data
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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -323.94 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 127.66 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -366.10 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 96.23 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1978 |
Liquid Phase Heat Capacity (Shomate Equation)
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 |
Solid Phase Heat Capacity (Shomate Equation)
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. - 1000. | 1000. - 1276. | 1276. - 1445. |
|---|---|---|---|
| A | 78.38780 | 58023.20 | -542020.0 |
| B | 13.94820 | -104689.0 | 789111.0 |
| C | 2.753281 | 70037.20 | -431902.0 |
| D | -2.347990 | -16374.80 | 84244.40 |
| E | 0.008301 | -6903.890 | 103416.0 |
| F | -390.0830 | -32139.00 | 373259.0 |
| G | 186.8820 | 71878.20 | -549542.0 |
| H | -366.1000 | -366.1000 | -366.1000 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in March, 1978 | Data last reviewed in March, 1978 | Data last reviewed in March, 1978 |
References
Go To: Top, Condensed phase thermochemistry data, 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, Condensed phase thermochemistry data, References
- Symbols used in this document:
S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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