Magnesium dimer
- Formula: Mg2
- Molecular weight: 48.6100
- IUPAC Standard InChI: InChI=1S/2Mg
- IUPAC Standard InChIKey: HZZOEADXZLYIHG-UHFFFAOYSA-N
- CAS Registry Number: 29904-79-8
- Chemical structure:
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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 | 287.63 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1983 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 240.19 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1983 |
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 800. | 800. to 2000. | 2000. to 4000. | 4000. to 6000. |
|---|---|---|---|---|
| A | 21.46190 | 14.49080 | 682.8550 | -3665.920 |
| B | -2.454191 | 10.38760 | -473.1830 | 1622.910 |
| C | 3.197761 | -6.352520 | 119.7670 | -252.0680 |
| D | -1.440731 | 1.367051 | -9.569871 | 13.37470 |
| E | 0.294835 | 1.196491 | -474.4530 | 6641.450 |
| F | 282.2990 | 286.2340 | -613.7200 | 8255.660 |
| G | 268.4200 | 259.8700 | 481.2200 | 833.0970 |
| H | 287.6250 | 287.6250 | 287.6250 | 287.6250 |
| Reference | Chase, 1998 | Chase, 1998 | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in September, 1983 | Data last reviewed in September, 1983 | Data last reviewed in September, 1983 | Data last reviewed in September, 1983 |
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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