magnesium dihydride
- Formula: H2Mg
- Molecular weight: 26.3209
- IUPAC Standard InChI: InChI=1S/Mg.2H
- IUPAC Standard InChIKey: RSHAOIXHUHAZPM-UHFFFAOYSA-N
- CAS Registry Number: 7693-27-8
- Chemical structure:
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View 3d structure (requires JavaScript / HTML 5) - Other names: Magnesium hydride
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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 2000. |
|---|---|
| A | 13.30646 |
| B | 103.1607 |
| C | -60.36801 |
| D | 12.17967 |
| E | -0.332913 |
| F | -85.32850 |
| G | 17.08034 |
| H | -76.14922 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in September, 1963 |
| 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. | 35.26 | 31.01 | 31.10 | -0.02 |
| 300. | 35.45 | 31.25 | 31.10 | 0.05 |
| 400. | 43.61 | 42.62 | 32.58 | 4.02 |
| 500. | 49.99 | 53.06 | 35.64 | 8.71 |
| 600. | 55.18 | 62.65 | 39.36 | 13.98 |
| 700. | 59.44 | 71.49 | 43.33 | 19.71 |
| 800. | 62.92 | 79.66 | 47.36 | 25.84 |
| 900. | 65.72 | 87.24 | 51.38 | 32.27 |
| 1000. | 67.95 | 94.28 | 55.32 | 38.96 |
| 1100. | 69.67 | 100.8 | 59.16 | 45.85 |
| 1200. | 70.98 | 107.0 | 62.90 | 52.88 |
| 1300. | 71.96 | 112.7 | 66.51 | 60.03 |
| 1400. | 72.66 | 118.0 | 70.00 | 67.27 |
| 1500. | 73.18 | 123.1 | 73.37 | 74.56 |
| 1600. | 73.58 | 127.8 | 76.63 | 81.90 |
| 1700. | 73.94 | 132.3 | 79.77 | 89.27 |
| 1800. | 74.33 | 136.5 | 82.81 | 96.69 |
| 1900. | 74.83 | 140.6 | 85.74 | 104.1 |
| 2000. | 75.51 | 144.4 | 88.58 | 111.7 |
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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