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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- Information on this page:
- 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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Condensed phase thermochemistry data
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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | 6.231 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1973 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 8.652 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1973 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 5.645 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1973 |
Liquid Phase Heat Capacity (Shomate Equation)
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) | 2130. - 2952.078 |
|---|---|
| A | 9.400110 |
| B | 0.000000 |
| C | 0.000000 |
| D | 0.000000 |
| E | 0.000000 |
| F | 1.143631 |
| G | 16.18330 |
| H | 6.230412 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1973 |
Solid Phase Heat Capacity (Shomate Equation)
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. - 600. | 600. - 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 |
References
Go To: Top, Condensed phase thermochemistry data, 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, Condensed phase thermochemistry data, References
- Symbols used in this document:
S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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