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6NO + 4HNO2 🔥→ NH4NO2 + 4N2O3

The reaction of nitrogen monoxide and nitrous acid yields ammonium nitrite and dinitrogen trioxide (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:

Table of contents
  1. 1Reaction data
  2. 2Thermodynamic changes
  3. 3References
  4. 4Related reactions
  5. 5Related categories

Reaction data

Chemical equation

General equation

Reaction of self redoxing species and acid
Self-redoxing speciesSelf redox agent + AcidNon-redox agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NONitrogen monoxide6
Self redoxing
HNO2Nitrous acid4
Acid

Products

Chemical formulaNameCoefficientTypeType in general
equation
NH4NO2Ammonium nitrite1
Redoxed product
N2O3Dinitrogen trioxide4
Oxidized

Thermodynamic changes

Changes in standard condition

Reaction of nitrogen monoxide and nitrous acid
ΔrG129.3 kJ/mol
K0.22 × 10−22
pK22.65
6NOGas + 4HNO2Un-ionized aqueous solution
🔥
NH4NO2Ionized aqueous solution + 4N2O3Gas
Standard enthalpy
of reaction
ΔrH°
kJ · mol−1
Standard
Gibbs energy
of reaction
ΔrG°
kJ · mol−1
Standard entropy
of reaction
ΔrS°
J · K−1 · mol−1
Standard heat
capacity of reaction
at constant pressure
ΔrCp°
J · K−1 · mol−1
per 1 mol of
Equation
33.0129.3−321.4
per 1 mol of
5.5021.55−53.57
per 1 mol of
8.2532.33−80.35
per 1 mol of
33.0129.3−321.4
8.2532.33−80.35

Thermodynamic data of reactants

Chemical formulaStandard enthalpy
of formation
ΔfH°
kJ · mol−1
Standard Gibbs
energy of
formation
ΔfG°
kJ · mol−1
Standard
molar entropy
S°
J · K−1 · mol−1
Standard molar
heat capacity at
constant pressure
Cp°
J · K−1 · mol−1
NO (g)90.25[1]86.55[1]210.761[1]29.844[1]
HNO2 (g)
cis
-77.99[1]-42.94[1]248.76[1]44.77[1]
HNO2 (g)
trans
-80.12[1]-45.24[1]249.22[1]46.07[1]
HNO2 (g)-79.5[1]-46.0[1]254.1[1]45.6[1]
HNO2 (ao)-119.2[1]-50.6[1]135.6[1]
* (g):Gas, (ao):Un-ionized aqueous solution

Thermodynamic data of products

Chemical formulaStandard enthalpy
of formation
ΔfH°
kJ · mol−1
Standard Gibbs
energy of
formation
ΔfG°
kJ · mol−1
Standard
molar entropy
S°
J · K−1 · mol−1
Standard molar
heat capacity at
constant pressure
Cp°
J · K−1 · mol−1
NH4NO2 (cr)-256.5[1]
NH4NO2 (ai)-237.2[1]-111.6[1]236.4[1]-17.6[1]
N2O3 (l)50.29[1]
N2O3 (g)83.72[1]139.46[1]312.28[1]65.61[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (l):Liquid, (g):Gas

References

List of references

  1. 1