disodium disilicate
- Formula: Na2O5Si2
- Molecular weight: 182.1475
- CAS Registry Number: 13870-28-5
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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 | -2438.48 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 188.84 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -2470.07 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1967 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 164.09 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1967 |
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) | 1147. - 2500. |
|---|---|
| A | 261.2070 |
| B | -0.000054 |
| C | 0.000023 |
| D | -0.000004 |
| E | -0.000011 |
| F | -2537.700 |
| G | 451.8110 |
| H | -2438.480 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in September, 1967 |
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. - 980. | 980. - 1147. |
|---|---|---|
| A | 39.30228 | 292.8804 |
| B | 531.4266 | 0.000000 |
| C | -483.0888 | 0.000000 |
| D | 156.6151 | 0.000000 |
| E | -0.177640 | 0.000000 |
| F | -2501.982 | -2609.594 |
| G | 72.30078 | 416.4607 |
| H | -2470.070 | -2470.070 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in September, 1967 | Data last reviewed in September, 1967 |
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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