Magnesium carbide
- Formula: C3Mg2
- Molecular weight: 84.6421
- CAS Registry Number: 12151-74-5
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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 (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 2500. |
|---|---|
| A | 28.36661 |
| B | 2.579561 |
| C | -0.013452 |
| D | 0.002940 |
| E | -0.597694 |
| F | 8.412689 |
| G | 54.17001 |
| H | 19.00000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1960 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 298. | 22.40 | 23.96 | 24.01 | -0.01 |
| 300. | 22.50 | 24.11 | 24.01 | 0.03 |
| 400. | 25.66 | 31.08 | 24.93 | 2.46 |
| 500. | 27.26 | 36.99 | 26.76 | 5.11 |
| 600. | 28.25 | 42.06 | 28.90 | 7.89 |
| 700. | 28.95 | 46.46 | 31.10 | 10.75 |
| 800. | 29.49 | 50.37 | 33.27 | 13.68 |
| 900. | 29.94 | 53.87 | 35.37 | 16.65 |
| 1000. | 30.34 | 57.04 | 37.38 | 19.66 |
| 1100. | 30.70 | 59.95 | 39.30 | 22.72 |
| 1200. | 31.03 | 62.64 | 41.14 | 25.80 |
| 1300. | 31.35 | 65.13 | 42.89 | 28.92 |
| 1400. | 31.65 | 67.47 | 44.56 | 32.07 |
| 1500. | 31.95 | 69.66 | 46.16 | 35.25 |
| 1600. | 32.24 | 71.73 | 47.70 | 38.46 |
| 1700. | 32.52 | 73.70 | 49.17 | 41.70 |
| 1800. | 32.80 | 75.56 | 50.58 | 44.97 |
| 1900. | 33.07 | 77.34 | 51.94 | 48.26 |
| 2000. | 33.35 | 79.05 | 53.26 | 51.58 |
| 2100. | 33.62 | 80.68 | 54.52 | 54.93 |
| 2200. | 33.88 | 82.25 | 55.75 | 58.30 |
| 2300. | 34.15 | 83.76 | 56.93 | 61.70 |
| 2400. | 34.42 | 85.22 | 58.08 | 65.13 |
| 2500. | 34.68 | 86.63 | 59.20 | 68.59 |
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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