calcium sulphide
- Formula: CaS
- Molecular weight: 72.143
- IUPAC Standard InChI: InChI=1S/Ca.S
- IUPAC Standard InChIKey: JGIATAMCQXIDNZ-UHFFFAOYSA-N
- CAS Registry Number: 20548-54-3
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Calcium sulfide
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Gas 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°gas | 123.59 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1977 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 232.59 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1977 |
Gas 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 1400. | 1400. to 3000. | 3000. to 6000. |
|---|---|---|---|
| A | 33.08887 | -247.8309 | 254.7052 |
| B | 15.89464 | 258.9883 | -86.85356 |
| C | -21.61998 | -74.23546 | 13.05132 |
| D | 10.84635 | 6.965901 | -0.689578 |
| E | -0.123820 | 106.5113 | -287.7881 |
| F | 112.7768 | 395.8616 | -317.4526 |
| G | 268.0601 | 104.5720 | 244.2067 |
| H | 123.5949 | 123.5949 | 123.5949 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in September, 1977 | Data last reviewed in September, 1977 | Data last reviewed in September, 1977 |
References
Go To: Top, Gas 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, Gas phase thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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