calcium dihydroxide
- Formula: CaH2O2
- Molecular weight: 74.093
- CAS Registry Number: 1305-62-0
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Gas phase thermochemistry data
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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 | -145.98 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1975 |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 68.265 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1975 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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Temperature (K) | 298. to 6000. |
---|---|
A | 19.38410 |
B | 3.589680 |
C | -0.731134 |
D | 0.051122 |
E | -0.249068 |
F | -152.7460 |
G | 89.28301 |
H | -145.9760 |
Reference | Chase, 1998 |
Comment | Data last reviewed in December, 1975 |
Reaction thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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Individual Reactions
H2CaO2 + 2 = CaCl2 + 2
+ 2
By formula: H2CaO2 + 2C2HCl5 = CaCl2 + 2C2Cl4 + 2H2O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -43.40 | kcal/mol | Cm | Kirkbride, 1956 | liquid phase |
H2CaO2 + 2 = CaCl2 + 2
+ 2
By formula: H2CaO2 + 2C2H2Cl4 = CaCl2 + 2H2O + 2C2HCl3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -36. | kcal/mol | Cm | Kirkbride, 1956 | liquid phase |
References
Go To: Top, Gas phase thermochemistry data, Reaction 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]
Kirkbride, 1956
Kirkbride, F.W.,
The heats of chlorination of some hydrocarbons and their chloro-derivatives,
J. Appl. Chem., 1956, 6, 11-21. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction 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 ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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