Pyrite (FeS2)
- Formula: FeS2
- Molecular weight: 119.975
- CAS Registry Number: 1309-36-0
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Solid 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. to 1400. |
|---|---|
| A | 82.30388 |
| B | -23.72240 |
| C | 35.14598 |
| D | -9.598515 |
| E | -1.396524 |
| F | -195.8150 |
| G | 151.2010 |
| H | -167.3600 |
| Reference | Chase, 1998 |
| Comment | pyrite phase; Data last reviewed in September, 1977 |
| 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. | 62.38 | 53.83 | 53.84 | -0.00 |
| 300. | 62.57 | 54.25 | 53.84 | 0.12 |
| 400. | 69.10 | 73.27 | 56.40 | 6.75 |
| 500. | 72.44 | 89.08 | 61.40 | 13.84 |
| 600. | 74.77 | 102.5 | 67.16 | 21.20 |
| 700. | 76.78 | 114.2 | 73.06 | 28.78 |
| 800. | 78.72 | 124.6 | 78.86 | 36.56 |
| 900. | 80.70 | 133.9 | 84.47 | 44.53 |
| 1000. | 82.73 | 142.6 | 89.85 | 52.70 |
| 1100. | 84.81 | 150.5 | 95.01 | 61.08 |
| 1200. | 86.89 | 158.0 | 99.95 | 69.66 |
| 1300. | 88.95 | 165.0 | 104.7 | 78.45 |
| 1400. | 90.93 | 171.7 | 109.2 | 87.45 |
References
Go To: Top, Solid 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, Solid Phase Heat Capacity (Shomate Equation), References
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