carbon
- Formula: C
- Molecular weight: 12.0107
- IUPAC Standard InChI: InChI=1S/C
- IUPAC Standard InChIKey: OKTJSMMVPCPJKN-UHFFFAOYSA-N
- CAS Registry Number: 7440-44-0
- Chemical structure:
This structure is also available as a 2d Mol file - Species with the same structure:
- Other names: activated carbon
- 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)
- Electron-Impact Ionization Cross Sections (on physics web site)
- Computational Chemistry Comparison and Benchmark Database
- Gas Phase Kinetics Database
- X-ray Photoelectron Spectroscopy Database, version 5.0
- X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, 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°gas | 716.68 ± 0.45 | kJ/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| ΔfH°gas | 716.67 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1983 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 158.100 ± 0.003 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| S°gas,1 bar | 158.10 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1983 |
Gas 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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 6000. |
|---|---|
| A | 21.17510 |
| B | -0.812428 |
| C | 0.448537 |
| D | -0.043256 |
| E | -0.013103 |
| F | 710.3470 |
| G | 183.8734 |
| H | 716.6690 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1983 |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°solid,1 bar | 5.833 | J/mol*K | N/A | Takahashi and Westrum, 1970 | amorphous phase; Values actually S-S0; there may be a residual entropy. |
| S°solid,1 bar | 6.201 | J/mol*K | N/A | Lutcov, Volga, et al., 1970 | T2 extrapolation below 50 K. |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 10.68 | 350. | Dobrosavljevic, Perovic, et al., 1987 | T = 300 to 1800 K. |
| 9.251 | 298.15 | Lutcov, Volga, et al., 1970 | T = 52 to 302 K. |
| 8.598 | 298.15 | Takahashi and Westrum, 1970 | amorphous phase; T = 5-350 K. |
References
Go To: Top, Gas phase thermochemistry data, 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.
Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A.,
CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Takahashi and Westrum, 1970
Takahashi, Y.; Westrum, E.F., Jr.,
Glassy carbon. Low-temperature thermodynamic properties,
J. Chem. Thermodynam., 1970, 2, 847-854. [all data]
Lutcov, Volga, et al., 1970
Lutcov, A.I.; Volga, V.I.; Dymov, B.K.,
Thermal conductivity, electric resistivity and specific heat of dense graphites,
Carbon, 1970, 8, 753-760. [all data]
Dobrosavljevic, Perovic, et al., 1987
Dobrosavljevic, A.; Perovic, N.; Maglic, K.,
Thermophysical properties of POCO AXM-5Q1 graphite in the 300 to 1800 K range,
High Temperatures-High Pressures, 1987, 19, 303-310. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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