Nitrogen dioxide
- Formula: NO2
- Molecular weight: 46.0055
- IUPAC Standard InChIKey: JCXJVPUVTGWSNB-UHFFFAOYSA-N
- CAS Registry Number: 10102-44-0
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Nitrogen oxide; Nitrito; Nitro; Nitrogen peroxide; Azote; Rcra waste number P078; Stickstoffdioxid; Stikstofdioxyde; Nitrogen dioxide (NO2)
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Gas phase thermochemistry data
Go To: Top, Reaction thermochemistry data, Mass spectrum (electron ionization), 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 | 33.10 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1964 |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 240.04 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1964 |
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 1200. | 1200. to 6000. |
---|---|---|
A | 16.10857 | 56.82541 |
B | 75.89525 | 0.738053 |
C | -54.38740 | -0.144721 |
D | 14.30777 | 0.009777 |
E | 0.239423 | -5.459911 |
F | 26.17464 | 2.846456 |
G | 240.5386 | 290.5056 |
H | 33.09502 | 33.09502 |
Reference | Chase, 1998 | Chase, 1998 |
Comment | Data last reviewed in September, 1964 | Data last reviewed in September, 1964 |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
By formula: (NO2- • 4294967295NO2) + NO2 = NO2-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 449.0 ± 1.3 | kJ/mol | N/A | Davidson, Fehsenfeld, et al., 1977 | gas phase; Relative to HBr, reevaluated with current HBr acidity. Excited state at 3.0 eV,81WU /TIE.; B |
ΔrH° | <192.9 | kJ/mol | PDis | Smith, Lee, et al., 1979 | gas phase; Isomer: O4- + NO ->.; B |
ΔrH° | 276. ± 21. | kJ/mol | PDis | Smith, Lee, et al., 1978 | gas phase; B |
By formula: 0.76NO2 + 0.62N2O4 + CH3NO3 = N2O5 + CH3NO2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 36.24 | kJ/mol | Cm | Ray and Ogg, 1959 | liquid phase; ALS |
By formula: CH3NO2 + HNO3 = 2NO2 + CH4O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 66.48 | kJ/mol | Eqk | Silverwood and Thomas, 1967 | gas phase; ALS |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Reaction 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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
NIST MS number | 82 |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Mass spectrum (electron ionization), 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]
Davidson, Fehsenfeld, et al., 1977
Davidson, J.A.; Fehsenfeld, F.C.; Howard, C.J.,
The heats of formation of NO3- and NO3- association complexes with HNO3 and HBr,
Int. J. Chem. Kinet., 1977, 9, 17. [all data]
Smith, Lee, et al., 1979
Smith, G.P.; Lee, L.C.; Moseley, J.T.,
Photodissociation and photodetachment of molecular negative ions. VIII. Nitrogen oxides and hydrates,3500-8250 Å,
J. Chem. Phys., 1979, 71, 4034. [all data]
Smith, Lee, et al., 1978
Smith, G.P.; Lee, L.C.; Cosby, P.C.; Peterson, J.R.; Moseley, J.T.,
Photodissociation and photodetachment of molecular negative ions. V. Atmospheric ions from 7000 to 8400 A),
J. Chem. Phys., 1978, 68, 3818. [all data]
Ray and Ogg, 1959
Ray, J.D.; Ogg, R.A., Jr.,
The heat of formation of methyl nitrate,
J. Phys. Chem., 1959, 63, 1522-1523. [all data]
Silverwood and Thomas, 1967
Silverwood, R.; Thomas, J.H.,
Reaction between methanol and nitrogen dioxide. Part 1.-Low-temperature reaction and the thermodynamic constants of methyl nitrite,
J. Chem. Soc. Faraday Trans., 1967, 63, 2476-2479. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Mass spectrum (electron ionization), References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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