dipotassium sulphide
- Formula: K2S
- Molecular weight: 110.262
- CAS Registry Number: 1312-73-8
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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 | -346.51 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 141.17 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -376.56 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 115.06 | 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) | 1221. to 3000. |
|---|---|
| A | 100.9603 |
| B | 6.043036×10-8 |
| C | -2.627381×10-8 |
| D | 3.831963×10-9 |
| E | 1.035846×10-8 |
| F | -386.7844 |
| G | 242.4812 |
| H | -346.5063 |
| 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. to 800. | 800. to 1050. | 1050. to 1221. |
|---|---|---|---|
| A | 69.17220 | 81853.30 | -219.1790 |
| B | 16.75400 | -157961.0 | 607.2850 |
| C | 13.43840 | 113333.0 | -381.9350 |
| D | -6.573700 | -28439.40 | 85.26800 |
| E | -0.045088 | -8628.280 | 51.00700 |
| F | -398.1860 | -42482.30 | -238.6090 |
| G | 192.9800 | 106679.0 | -198.2940 |
| H | -376.5600 | -376.5600 | -376.5600 |
| 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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