Nitric acid

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Gas phase thermochemistry data

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics 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-32.101kcal/molReviewChase, 1998Data last reviewed in June, 1963
Quantity Value Units Method Reference Comment
S°gas,1 bar63.669cal/mol*KReviewChase, 1998Data last reviewed in June, 1963

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 (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. to 1200.1200. to 6000.
A 4.69223023.29340
B 36.797301.297701
C -27.68590-0.246101
D 7.8584020.016241
E -0.059540-2.938131
F -35.10559-46.00650
G 59.2028982.17139
H -32.09990-32.09990
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1963 Data last reviewed in June, 1963

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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 as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
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

(NO3 anion • Nitric acid) + Nitric acid = (NO3 anion • 2Nitric acid)

By formula: (NO3- • HNO3) + HNO3 = (NO3- • 2HNO3)

Quantity Value Units Method Reference Comment
ΔrH°18.3 ± 1.0kcal/molTDAsDavidson, Fehsenfeld, et al., 1977gas phase; B,M
ΔrH°16.00 ± 0.80kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B,M
ΔrH°18.4kcal/molATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
ΔrH°17.7kcal/molHPMSLee, Keesee, et al., 1980gas phase; M
ΔrH°20.0kcal/molATMArnold and Qiu, 1984gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°25.cal/mol*KN/AArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
ΔrS°22.1cal/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; M
ΔrS°25.cal/mol*KN/AArnold and Qiu, 1984gas phase; Entropy change calculated or estimated; M
ΔrS°23.1cal/mol*KHPMSWlodek, Luczynski, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°11.7 ± 2.2kcal/molTDAsDavidson, Fehsenfeld, et al., 1977gas phase; B,M
ΔrG°9.00 ± 0.30kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
12.6233.ATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
13.8250.ATMArnold and Qiu, 1984gas phase; Entropy change calculated or estimated; M

(NO3 anion • 2Nitric acid) + Nitric acid = (NO3 anion • 3Nitric acid)

By formula: (NO3- • 2HNO3) + HNO3 = (NO3- • 3HNO3)

Quantity Value Units Method Reference Comment
ΔrH°16.1 ± 1.0kcal/molTDAsDavidson, Fehsenfeld, et al., 1977gas phase; B,M
ΔrH°13.9 ± 1.4kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B,M
ΔrH°16.0kcal/molATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
ΔrH°16.0kcal/molHPMSLee, Keesee, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°25.cal/mol*KN/AArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
ΔrS°28.9cal/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; M
ΔrS°26.7cal/mol*KHPMSWlodek, Luczynski, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°7.4 ± 2.2kcal/molTDAsDavidson, Fehsenfeld, et al., 1977gas phase; B
ΔrG°5.90 ± 0.40kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B
ΔrG°6.9kcal/molFAFehsenfeld, Howard, et al., 1975gas phase; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
10.2233.ATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

NO3 anion + Hydrogen cation = Nitric acid

By formula: NO3- + H+ = HNO3

Quantity Value Units Method Reference Comment
ΔrH°324.50 ± 0.20kcal/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; Relative to HBr, reevaluated with current HBr acidity. Excited state at 3.0 eV,81WU /TIE.; B
ΔrH°329.9 ± 4.8kcal/molNBAEMathur, Rothe, et al., 1976gas phase; From HNO3; B
ΔrH°329.1 ± 5.8kcal/molEndoRefaey and Franklin, 1976gas phase; I- + HNO3 ->.; B
ΔrH°324.50 ± 0.50kcal/molTDEqFerguson, Dunkin, et al., 1972gas phase; B
ΔrH°356.30kcal/molEndoBerkowitz, Chupka, et al., 1971gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°317.80 ± 0.20kcal/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; Relative to HBr, reevaluated with current HBr acidity. Excited state at 3.0 eV,81WU /TIE.; B

(Bromine anion • Nitric acid) + Nitric acid = (Bromine anion • 2Nitric acid)

By formula: (Br- • HNO3) + HNO3 = (Br- • 2HNO3)

Quantity Value Units Method Reference Comment
ΔrH°18.1kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle(Br-/NO3- - HNO3/HBr), Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°23.6cal/mol*KN/ADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle(Br-/NO3- - HNO3/HBr), Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrG°11.1kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle(Br-/NO3- - HNO3/HBr), Entropy change calculated or estimated; M

Bromine anion + Nitric acid = (Bromine anion • Nitric acid)

By formula: Br- + HNO3 = (Br- • HNO3)

Quantity Value Units Method Reference Comment
ΔrH°20.0kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr), ΔrH>; M
Quantity Value Units Method Reference Comment
ΔrS°18.5cal/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr), ΔrH>; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
13.4367.FADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr), ΔrH>; M

(NO3 anion • Nitric acid) + Water = (NO3 anion • Water • Nitric acid)

By formula: (NO3- • HNO3) + H2O = (NO3- • H2O • HNO3)

Quantity Value Units Method Reference Comment
ΔrH°13.0kcal/molATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°25.cal/mol*KN/AArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
7.3233.ATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

(HO4S- • 2Sulfuric Acid) + Nitric acid = (HO4S- • Nitric acid • 2Sulfuric Acid)

By formula: (HO4S- • 2H2O4S) + HNO3 = (HO4S- • HNO3 • 2H2O4S)

Quantity Value Units Method Reference Comment
ΔrH°15.9kcal/molATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°25.cal/mol*KN/AArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
10.3233.ATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

(HO4S- • 3Sulfuric Acid) + Nitric acid = (HO4S- • Nitric acid • 3Sulfuric Acid)

By formula: (HO4S- • 3H2O4S) + HNO3 = (HO4S- • HNO3 • 3H2O4S)

Quantity Value Units Method Reference Comment
ΔrH°16.9kcal/molATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°25.cal/mol*KN/AArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
11.1233.ATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

(HO4S- • Nitric acid) + HO3S = (HO4S- • HO3S • Nitric acid)

By formula: (HO4S- • HNO3) + HO3S = (HO4S- • HO3S • HNO3)

Quantity Value Units Method Reference Comment
ΔrH°21.7kcal/molATMArnold and Qiu, 1984gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°25.cal/mol*KN/AArnold and Qiu, 1984gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
15.5250.ATMArnold and Qiu, 1984gas phase; Entropy change calculated or estimated; M

(HO4S- • Nitric acid) + Water = (HO4S- • Water • Nitric acid)

By formula: (HO4S- • HNO3) + H2O = (HO4S- • H2O • HNO3)

Quantity Value Units Method Reference Comment
ΔrH°13.0kcal/molATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°25.cal/mol*KN/AArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
7.2233.ATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

(HO4S- • Nitric acid) + Nitric acid = (HO4S- • 2Nitric acid)

By formula: (HO4S- • HNO3) + HNO3 = (HO4S- • 2HNO3)

Quantity Value Units Method Reference Comment
ΔrH°18.4kcal/molATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°25.cal/mol*KN/AArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
12.6233.ATMArnold, Viggiano, et al., 1982gas phase; Entropy change calculated or estimated; M

(NO3 anion • 3Nitric acid) + Nitric acid = (NO3 anion • 4Nitric acid)

By formula: (NO3- • 3HNO3) + HNO3 = (NO3- • 4HNO3)

Quantity Value Units Method Reference Comment
ΔrH°9.3 ± 1.3kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°19.9cal/mol*KHPMSWlodek, Luczynski, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°3.20 ± 0.40kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B
ΔrG°6.9 ± 1.0kcal/molIMREFehsenfeld, Howard, et al., 1975gas phase; B

(NO3 anion • Nitric acid) + Hydrogen bromide = (NO3 anion • Hydrogen bromide • Nitric acid)

By formula: (NO3- • HNO3) + HBr = (NO3- • HBr • HNO3)

Quantity Value Units Method Reference Comment
ΔrH°16.0kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
ΔrS°22.9cal/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
ΔrG°9.2kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M

(NO3 anion • 5Nitric acid) + Nitric acid = (NO3 anion • 6Nitric acid)

By formula: (NO3- • 5HNO3) + HNO3 = (NO3- • 6HNO3)

Quantity Value Units Method Reference Comment
ΔrH°4.60 ± 0.90kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°7.3cal/mol*KHPMSWlodek, Luczynski, et al., 1980gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
ΔrG°2.40 ± 0.70kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B

(NO3 anion • 4Nitric acid) + Nitric acid = (NO3 anion • 5Nitric acid)

By formula: (NO3- • 4HNO3) + HNO3 = (NO3- • 5HNO3)

Quantity Value Units Method Reference Comment
ΔrH°7.4 ± 1.2kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°18.6cal/mol*KHPMSWlodek, Luczynski, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrG°1.9 ± 1.0kcal/molTDAsWlodek, Luczynski, et al., 1980gas phase; B

(NO3 anion • Hydrogen bromide) + Nitric acid = (NO3 anion • Nitric acid • Hydrogen bromide)

By formula: (NO3- • HBr) + HNO3 = (NO3- • HNO3 • HBr)

Quantity Value Units Method Reference Comment
ΔrH°16.0 ± 2.0kcal/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°9.6 ± 2.8kcal/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; B

1,2,3-Propanetriol, 1,3-dinitrate + Nitric acid = Nitroglycerin + Water

By formula: C3H6N2O7 + HNO3 = C3H5N3O9 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-1.4 ± 0.3kcal/molEqkKazakov, Kirpichev, et al., 1990liquid phase; Heat of nitration; ALS
ΔrH°-1.3 ± 0.3kcal/molCmKazakov, Lagodzinskaya, et al., 1989liquid phase; ALS

Glycerin + Nitric acid = 1,2,3-Propanetriol, 1-nitrate + Water

By formula: C3H8O3 + HNO3 = C3H7NO5 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-4.5 ± 0.5kcal/molEqkKazakov, Kirpichev, et al., 1990liquid phase; Heat of Nitration; ALS
ΔrH°-2.39kcal/molCmTsvetkov, Sopin, et al., 1986liquid phase; ALS

NO3 anion + Nitric acid = (NO3 anion • Nitric acid)

By formula: NO3- + HNO3 = (NO3- • HNO3)

Quantity Value Units Method Reference Comment
ΔrS°24.cal/mol*KN/ADavidson, Fehsenfeld, et al., 1977gas phase; Entropy change calculated or estimated, DG>, ΔrH>; M

Sodium ion (1+) + Nitric acid = (Sodium ion (1+) • Nitric acid)

By formula: Na+ + HNO3 = (Na+ • HNO3)

Quantity Value Units Method Reference Comment
ΔrH°20.6kcal/molFAPerry, Rowe, et al., 1980gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°20.3cal/mol*KFAPerry, Rowe, et al., 1980gas phase; M

Glycerol-2-nitrate + Nitric acid = Glycerol, 1,2-dinitrate + Water

By formula: C3H7NO5 + HNO3 = C3H6N2O7 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-3.7 ± 0.7kcal/molEqkKazakov, Kirpichev, et al., 1990liquid phase; Heat of nitration; ALS

Glycerin + Nitric acid = Glycerol-2-nitrate + Water

By formula: C3H8O3 + HNO3 = C3H7NO5 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-2.5 ± 0.6kcal/molEqkKazakov, Kirpichev, et al., 1990liquid phase; Heat of nitration; ALS

Glycerol, 1,2-dinitrate + Water = 1,2,3-Propanetriol, 1-nitrate + Nitric acid

By formula: C3H6N2O7 + H2O = C3H7NO5 + HNO3

Quantity Value Units Method Reference Comment
ΔrH°1.7 ± 0.6kcal/molEqkKazakov, Kirpichev, et al., 1990liquid phase; Heat of nitration; ALS

Glycerol, 1,2-dinitrate + Nitric acid = Nitroglycerin + Water

By formula: C3H6N2O7 + HNO3 = C3H5N3O9 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-2.5 ± 0.3kcal/molEqkKazakov, Kirpichev, et al., 1990liquid phase; Heat of nitration; ALS

1,2,3-Propanetriol, 1-nitrate + 2Nitric acid = Nitroglycerin + 2Water

By formula: C3H7NO5 + 2HNO3 = C3H5N3O9 + 2H2O

Quantity Value Units Method Reference Comment
ΔrH°-4.2 ± 0.3kcal/molCmKazakov, Lagodzinskaya, et al., 1989liquid phase; ALS

Glycerin + 3Nitric acid = Nitroglycerin + 3Water

By formula: C3H8O3 + 3HNO3 = C3H5N3O9 + 3H2O

Quantity Value Units Method Reference Comment
ΔrH°-8.7 ± 0.4kcal/molCmKazakov, Lagodzinskaya, et al., 1989liquid phase; ALS

1,3-Propanediol, 2-(hydroxymethyl)- + Nitric acid = Ethanol, 2-(2-hydroxyethoxy)-, 1-nitrate + Water

By formula: C4H10O3 + HNO3 = C4H9NO5 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-2.70kcal/molCmTsvetkov, Sopin, et al., 1986liquid phase; ALS

Methyl nitrite + Nitric acid = 2Nitrogen dioxide + Methyl Alcohol

By formula: CH3NO2 + HNO3 = 2NO2 + CH4O

Quantity Value Units Method Reference Comment
ΔrH°15.89kcal/molEqkSilverwood and Thomas, 1967gas phase; ALS

Acetic acid, trifluoro-, anhydride + Nitric acid = C2F3NO4 + Trifluoroacetic acid

By formula: C4F6O3 + HNO3 = C2F3NO4 + C2HF3O2

Quantity Value Units Method Reference Comment
ΔrH°-6.60kcal/molCmTsvetkov, Shmakov, et al., 1989liquid phase; ALS

Pentaerythritol + Nitric acid = C5H11NO6 + Water

By formula: C5H12O4 + HNO3 = C5H11NO6 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-3.70kcal/molCmTsvetkov, Sopin, et al., 1986liquid phase; ALS

1,2-Ethanediol + Nitric acid = 2-hydroxyethyl nitrate + Water

By formula: C2H6O2 + HNO3 = C2H5NO4 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-1.9kcal/molCmTsvetkov, Sopin, et al., 1986liquid phase; ALS

Ethanol, 2,2'-oxybis- + Nitric acid = Ethanol, 2-(2-hydroxyethoxy)-, 1-nitrate + Water

By formula: C4H10O3 + HNO3 = C4H9NO5 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-2.1kcal/molCmTsvetkov, Sopin, et al., 1986liquid phase; ALS

Acetyl nitrate + Acetic acid = Acetic anhydride + Nitric acid

By formula: C2H3NO4 + C2H4O2 = C4H6O3 + HNO3

Quantity Value Units Method Reference Comment
ΔrH°3.99kcal/molCmTsvetkov, Shmakov, et al., 1989liquid phase; ALS

Isopropyl Alcohol + Nitric acid = Nitric acid, 1-methylethyl ester + Water

By formula: C3H8O + HNO3 = C3H7NO3 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-5.59kcal/molEqkRubtsov, 1986liquid phase; ALS

Methyl Alcohol + Nitric acid = Methyl nitrate + Water

By formula: CH4O + HNO3 = CH3NO3 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-6.60kcal/molEqkRubtsov, 1986liquid phase; ALS

Ethanol + Nitric acid = Nitric acid, ethyl ester + Water

By formula: C2H6O + HNO3 = C2H5NO3 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-6.00kcal/molEqkRubtsov, 1986liquid phase; ALS

1-Propanol + Nitric acid = Nitric acid, propyl ester + Water

By formula: C3H8O + HNO3 = C3H7NO3 + H2O

Quantity Value Units Method Reference Comment
ΔrH°-5.21kcal/molEqkRubtsov, 1986liquid phase; ALS

Gas phase ion energetics data

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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
MM - Michael M. Meot-Ner (Mautner)
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
LL - Sharon G. Lias and Joel F. Liebman

Quantity Value Units Method Reference Comment
Proton affinity (review)179.6kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity174.8kcal/molN/AHunter and Lias, 1998HL

Electron affinity determinations

EA (eV) Method Reference Comment
0.57 ± 0.15NBIEMathur, Rothe, et al., 1976B
0.56 ± 0.17EndoPaulson and Dale, 1982B

Proton affinity at 298K

Proton affinity (kcal/mol) Reference Comment
160.2Bernardi, Cacace, et al., 1998PA at NO+ binding site, estimated from correlation of PAs with NO+ binding energies; MM

Ionization energy determinations

IE (eV) Method Reference Comment
11.95 ± 0.01PELloyd, Roberts, et al., 1975LLK
11.96PEFrost, Lee, et al., 1975LLK
11.03 ± 0.01PINicholson, 1965RDSH
12.2PEAmes and Turner, 1976Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
OH+16.6NO2PIJochims, Denzer, et al., 1992LL
NO+13.07?PIJochims, Denzer, et al., 1992LL
NO2+11.90OHPIJochims, Denzer, et al., 1992LL

De-protonation reactions

NO3 anion + Hydrogen cation = Nitric acid

By formula: NO3- + H+ = HNO3

Quantity Value Units Method Reference Comment
ΔrH°324.50 ± 0.20kcal/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; Relative to HBr, reevaluated with current HBr acidity. Excited state at 3.0 eV,81WU /TIE.; B
ΔrH°329.9 ± 4.8kcal/molNBAEMathur, Rothe, et al., 1976gas phase; From HNO3; B
ΔrH°329.1 ± 5.8kcal/molEndoRefaey and Franklin, 1976gas phase; I- + HNO3 ->.; B
ΔrH°324.50 ± 0.50kcal/molTDEqFerguson, Dunkin, et al., 1972gas phase; B
ΔrH°356.30kcal/molEndoBerkowitz, Chupka, et al., 1971gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°317.80 ± 0.20kcal/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; Relative to HBr, reevaluated with current HBr acidity. Excited state at 3.0 eV,81WU /TIE.; B

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, References