magnesium diboride
- Formula: B2Mg
- Molecular weight: 45.927
- CAS Registry Number: 12007-25-9
- Information on this page:
- Other data available:
- Options:
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.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 298. - 2000. |
|---|---|
| A | 13.41420 |
| B | 1.700841 |
| C | 3.034250 |
| D | -0.799018 |
| E | -0.244777 |
| F | -26.90569 |
| G | 22.80960 |
| H | -21.97990 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1965 |
| 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. | 11.41 | 8.58 | 8.60 | -0.01 |
| 300. | 11.46 | 8.66 | 8.60 | 0.02 |
| 400. | 13.00 | 12.19 | 9.07 | 1.25 |
| 500. | 13.94 | 15.20 | 10.00 | 2.60 |
| 600. | 14.67 | 17.81 | 11.09 | 4.03 |
| 700. | 15.32 | 20.12 | 12.22 | 5.53 |
| 800. | 15.93 | 22.20 | 13.34 | 7.09 |
| 900. | 16.52 | 24.11 | 14.43 | 8.71 |
| 1000. | 17.11 | 25.88 | 15.49 | 10.40 |
| 1100. | 17.69 | 27.54 | 16.51 | 12.14 |
| 1200. | 18.27 | 29.11 | 17.49 | 13.93 |
| 1300. | 18.85 | 30.59 | 18.45 | 15.79 |
| 1400. | 19.43 | 32.01 | 19.36 | 17.70 |
| 1500. | 19.99 | 33.37 | 20.25 | 19.67 |
| 1600. | 20.53 | 34.68 | 21.11 | 21.70 |
| 1700. | 21.06 | 35.94 | 21.95 | 23.78 |
| 1800. | 21.57 | 37.16 | 22.76 | 25.91 |
| 1900. | 22.05 | 38.34 | 23.55 | 28.09 |
| 2000. | 22.50 | 39.48 | 24.32 | 30.32 |
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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.