boron
- Formula: B
- Molecular weight: 10.811
- IUPAC Standard InChI: InChI=1S/B
- IUPAC Standard InChIKey: ZOXJGFHDIHLPTG-UHFFFAOYSA-N
- CAS Registry Number: 7440-42-8
- Chemical structure:
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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. - 1800. | 1800. - 2350. |
|---|---|---|
| A | 2.434451 | 6.005412 |
| B | 6.989520 | 0.472154 |
| C | -4.307211 | 0.080878 |
| D | 1.006771 | -0.009568 |
| E | -0.131692 | -0.629918 |
| F | -1.442711 | -3.450280 |
| G | 1.694331 | 6.118380 |
| H | 0.000000 | 0.000000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | β-rhombohedral phase; Data last reviewed in June, 1983 | β-rhombohedral phase; Data last reviewed in June, 1983 |
| 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. | 2.68 | 1.39 | 1.39 | -0.00 |
| 300. | 2.71 | 1.41 | 1.39 | 0.00 |
| 400. | 3.78 | 2.35 | 1.51 | 0.33 |
| 500. | 4.45 | 3.27 | 1.77 | 0.75 |
| 600. | 4.93 | 4.12 | 2.09 | 1.22 |
| 700. | 5.29 | 4.91 | 2.44 | 1.73 |
| 800. | 5.58 | 5.64 | 2.80 | 2.27 |
| 900. | 5.81 | 6.31 | 3.15 | 2.84 |
| 1000. | 5.99 | 6.93 | 3.50 | 3.43 |
| 1100. | 6.14 | 7.51 | 3.84 | 4.04 |
| 1200. | 6.27 | 8.05 | 4.17 | 4.66 |
| 1300. | 6.38 | 8.56 | 4.48 | 5.29 |
| 1400. | 6.47 | 9.03 | 4.79 | 5.94 |
| 1500. | 6.57 | 9.48 | 5.09 | 6.59 |
| 1600. | 6.66 | 9.91 | 5.38 | 7.25 |
| 1700. | 6.77 | 10.32 | 5.66 | 7.92 |
| 1800. | 6.89 | 10.71 | 5.93 | 8.60 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 1800. | 6.87 | 10.71 | 5.93 | 8.61 |
| 1900. | 6.95 | 11.08 | 6.19 | 9.30 |
| 2000. | 7.04 | 11.44 | 6.44 | 10.0 |
| 2100. | 7.12 | 11.79 | 6.69 | 10.71 |
| 2200. | 7.20 | 12.12 | 6.93 | 11.42 |
| 2300. | 7.28 | 12.44 | 7.16 | 12.15 |
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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