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2NO2 + H2SeO3 → HNO3 + HNO2 + SeO2

The reaction of nitrogen dioxide and selenous acid yields nitric acid, nitrous acid, and selenium dioxide (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
NO2Nitrogen dioxide2
Self redoxing
H2SeO3Selenous acid1
Acid

Products

Chemical formulaNameCoefficientTypeType in general
equation
HNO3Nitric acid1
Oxidized
HNO2Nitrous acid1
Reduced
SeO2Selenium dioxide1

Thermodynamic changes

Changes in standard condition (1)

Reaction of nitrogen dioxide and selenous acid
2NO2Gas + H2SeO3Un-ionized aqueous solution
HNO3Ionized aqueous solution + HNO2Un-ionized aqueous solution + SeO2Aqueous solution
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
−107.1
per 1 mol of
−53.55
per 1 mol of
−107.1
per 1 mol of
−107.1
per 1 mol of
−107.1
per 1 mol of
−107.1

Changes in standard condition (2)

Reaction of nitrogen dioxide and selenous acid
2NO2Gas + H2SeO3Aqueous solution
HNO3Ionized aqueous solution + HNO2Un-ionized aqueous solution + SeO2Aqueous solution
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
−107.3
per 1 mol of
−53.65
per 1 mol of
−107.3
per 1 mol of
−107.3
per 1 mol of
−107.3
per 1 mol of
−107.3

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
NO2 (g)33.18[1]51.31[1]240.06[1]37.20[1]
H2SeO3 (cr)-524.46[1]
H2SeO3 (ao)-507.48[1]-426.14[1]207.9[1]
H2SeO3 (aq)-507.27[1]
* (g):Gas, (cr):Crystalline solid, (ao):Un-ionized aqueous solution, (aq):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
HNO3 (l)-174.10[1]-80.71[1]155.60[1]109.87[1]
HNO3 (g)-135.06[1]-74.72[1]266.38[1]53.35[1]
HNO3 (ai)-207.36[1]-111.25[1]146.4[1]-86.6[1]
HNO3 (l)
1 hydrate
-473.46[1]-328.77[1]216.90[1]182.46[1]
HNO3 (l)
3 hydrate
-1056.04[1]-811.09[1]346.98[1]325.14[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]
SeO2 (cr)-225.35[1]
SeO2 (aq)-221.63[1]
* (l):Liquid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (aq):Aqueous solution

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)