calcium dihydroxide
- Formula: CaH2O2
- Molecular weight: 74.093
- CAS Registry Number: 1305-62-0
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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. - 1000. |
|---|---|
| A | 130.8253 |
| B | -82.69216 |
| C | 122.7690 |
| D | -50.39210 |
| E | -2.513146 |
| F | -1030.841 |
| G | 247.1857 |
| H | -986.0851 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1975 |
| 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. | 87.45 | 83.31 | 83.40 | -0.02 |
| 300. | 87.78 | 83.90 | 83.40 | 0.15 |
| 400. | 98.46 | 110.8 | 86.99 | 9.54 |
| 500. | 103.8 | 133.4 | 94.08 | 19.67 |
| 600. | 107.5 | 152.7 | 102.3 | 30.25 |
| 700. | 110.7 | 169.5 | 110.7 | 41.16 |
| 800. | 113.5 | 184.5 | 119.0 | 52.38 |
| 900. | 116.0 | 198.0 | 127.1 | 63.86 |
| 1000. | 118.0 | 210.3 | 134.8 | 75.56 |
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
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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