chromium
- Formula: Cr
- Molecular weight: 51.9961
- IUPAC Standard InChI: InChI=1S/Cr
- IUPAC Standard InChIKey: VYZAMTAEIAYCRO-UHFFFAOYSA-N
- CAS Registry Number: 7440-47-3
- Chemical structure:
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- Other data available:
- Data at other public NIST sites:
- NIST Atomic Spectra Database - Lines Holdings (on physics web site)
- NIST Atomic Spectra Database - Levels Holdings (on physics web site)
- NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
- Gas Phase Kinetics Database
- X-ray Photoelectron Spectroscopy Database, version 5.0
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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 600. | 600. to 2130. |
|---|---|---|
| A | 1.790091 | 4.413261 |
| B | 17.09010 | 1.309271 |
| C | -21.91100 | 1.889180 |
| D | 11.00490 | -0.274342 |
| E | 0.033020 | 0.302531 |
| F | -1.010670 | -0.639804 |
| G | 3.778471 | 11.49460 |
| H | 0.000000 | 0.000000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1973 | Data last reviewed in June, 1973 |
| 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. | 5.60 | 5.64 | 5.65 | -0.00 |
| 300. | 5.61 | 5.68 | 5.65 | 0.01 |
| 400. | 6.03 | 7.35 | 5.87 | 0.59 |
| 500. | 6.37 | 8.74 | 6.31 | 1.21 |
| 600. | 6.62 | 9.92 | 6.81 | 1.86 |
| Temperature (K) |
Cp (cal/mol*K) |
S° (cal/mol*K) |
-(G° - H°298.15)/T (cal/mol*K) |
H° - H°298.15 (kcal/mol) |
|---|---|---|---|---|
| 600. | 6.66 | 9.93 | 6.81 | 1.87 |
| 700. | 6.78 | 10.96 | 7.33 | 2.54 |
| 800. | 7.00 | 11.88 | 7.85 | 3.23 |
| 900. | 7.30 | 12.72 | 8.34 | 3.94 |
| 1000. | 7.64 | 13.51 | 8.82 | 4.69 |
| 1100. | 8.02 | 14.25 | 9.28 | 5.47 |
| 1200. | 8.44 | 14.97 | 9.72 | 6.29 |
| 1300. | 8.88 | 15.66 | 10.15 | 7.16 |
| 1400. | 9.35 | 16.34 | 10.57 | 8.07 |
| 1500. | 9.84 | 17.00 | 10.98 | 9.03 |
| 1600. | 10.34 | 17.65 | 11.37 | 10.04 |
| 1700. | 10.86 | 18.29 | 11.76 | 11.10 |
| 1800. | 11.38 | 18.93 | 12.14 | 12.21 |
| 1900. | 11.92 | 19.56 | 12.52 | 13.37 |
| 2000. | 12.47 | 20.18 | 12.88 | 14.59 |
| 2100. | 13.02 | 20.80 | 13.25 | 15.87 |
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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