- Formula: I2
- Molecular weight: 253.80894
- IUPAC Standard InChI:
- Download the identifier in a file.
- IUPAC Standard InChIKey: PNDPGZBMCMUPRI-UHFFFAOYSA-N
- CAS Registry Number: 7553-56-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
- Other names: I2; Eranol; Iode; Iodine-127; Iodio; Iosan Superdip; Jod; Jood; Molecular iodine; Tincture iodine; Vistarin; Iodine crystals; Iodine sublimed; Diiodine; Diatomic iodine
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Gas phase thermochemistry data
Go To: Top, References, Notes
|fH°gas||62.42 ± 0.08||kJ/mol||Review||Cox, Wagman, et al., 1984||CODATA Review value|
|fH°gas||62.42||kJ/mol||Review||Chase, 1998||Data last reviewed in June, 1982|
|S°gas,1 bar||260.687 ± 0.005||J/mol*K||Review||Cox, Wagman, et al., 1984||CODATA Review value|
|S°gas,1 bar||260.69||J/mol*K||Review||Chase, 1998||Data last reviewed in June, 1982|
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
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.
|Temperature (K)||457.666 - 2000.||2000. - 6000.|
|Reference||Chase, 1998||Chase, 1998|
|Comment||Data last reviewed in June, 1982||Data last reviewed in June, 1982|
Go To: Top, Gas phase thermochemistry data, Notes
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, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Go To: Top, Gas phase thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) fH°gas Enthalpy of formation of gas at standard conditions
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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