- Formula: CHNO
- Molecular weight: 43.0247
- IUPAC Standard InChI:
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- IUPAC Standard InChIKey: OWIKHYCFFJSOEH-UHFFFAOYSA-N
- CAS Registry Number: 75-13-8
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
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Gas phase thermochemistry data
Go To: Top, References, Notes
Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
|fH°gas||-24.300||kcal/mol||Review||Chase, 1998||Data last reviewed in December, 1970|
|fH°gas||-23.1 ± 3.2||kcal/mol||Ion||Okabe, 1970||ALS|
|S°gas,1 bar||56.936||cal/mol*K||Review||Chase, 1998||Data last reviewed in December, 1970|
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
|Temperature (K)||298. - 1200.||1200. - 6000.|
|Reference||Chase, 1998||Chase, 1998|
|Comment||Data last reviewed in December, 1970||Data last reviewed in December, 1970|
Go To: Top, Gas phase thermochemistry data, Notes
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Okabe, H., Photodissociation of HNCO in the vacuum ultraviolet; production of NCO A2«SIGMA» and NH (A3«pi», «pi»C1), J. Chem. Phys., 1970, 53, 3507-3515. [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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