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3CO + 2HNO3 → N2O3 + 3CO2 + H2

The reaction of carbon monoxide and nitric acid yields dinitrogen trioxide, carbon dioxide, and hydrogen (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 reducing species and oxidizing species
Reducing speciesReducing agent + Oxidizing speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
COCarbon monoxide3
Reducing
Reducing
HNO3Nitric acid2
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
N2O3Dinitrogen trioxide1
Reduced
CO2Carbon dioxide3
Oxidized
H2Hydrogen1
Reduced

Thermodynamic changes

Changes in standard condition

Reaction of carbon monoxide and nitric acid
ΔrG−470.69 kJ/mol
K2.89 × 1082
pK−82.46
3COGas + 2HNO3Liquid
N2O3Gas + 3CO2Gas + H2Gas
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
−417.03−470.69179.96−101.40
per 1 mol of
−139.01−156.9059.987−33.800
per 1 mol of
−208.51−235.3489.980−50.700
−417.03−470.69179.96−101.40
per 1 mol of
−139.01−156.9059.987−33.800
per 1 mol of
−417.03−470.69179.96−101.40

Changes in aqueous solution (1)

Reaction of carbon monoxide and nitric acid
ΔrG−461.42 kJ/mol
K6.88 × 1080
pK−80.84
3COUn-ionized aqueous solution + 2HNO3Ionized aqueous solution
N2O3Gas + 3CO2Gas + H2Gas
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
−319.21−461.42477.6
per 1 mol of
−106.40−153.81159.2
per 1 mol of
−159.60−230.71238.8
−319.21−461.42477.6
per 1 mol of
−106.40−153.81159.2
per 1 mol of
−319.21−461.42477.6

Changes in aqueous solution (2)

Reaction of carbon monoxide and nitric acid
ΔrG−443.8 kJ/mol
K5.63 × 1077
pK−77.75
3COUn-ionized aqueous solution + 2HNO3Ionized aqueous solution
N2O3Gas + 3CO2Gas + H2Un-ionized aqueous 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
−323.4−443.8924
per 1 mol of
−107.8−147.9308
per 1 mol of
−161.7−221.9462
−323.4−443.8924
per 1 mol of
−107.8−147.9308
per 1 mol of
−323.4−443.8924

Changes in aqueous solution (3)

Reaction of carbon monoxide and nitric acid
ΔrG−436.28 kJ/mol
K2.71 × 1076
pK−76.43
3COUn-ionized aqueous solution + 2HNO3Ionized aqueous solution
N2O3Gas + 3CO2Un-ionized aqueous solution + H2Gas
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
−380.08−436.28189.2
per 1 mol of
−126.69−145.4363.07
per 1 mol of
−190.04−218.1494.60
−380.08−436.28189.2
per 1 mol of
−126.69−145.4363.07
per 1 mol of
−380.08−436.28189.2

Changes in aqueous solution (4)

Reaction of carbon monoxide and nitric acid
ΔrG−418.7 kJ/mol
K2.25 × 1073
pK−73.35
3COUn-ionized aqueous solution + 2HNO3Ionized aqueous solution
N2O3Gas + 3CO2Un-ionized aqueous solution + H2Un-ionized aqueous 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
−384.3−418.7635
per 1 mol of
−128.1−139.6212
per 1 mol of
−192.2−209.3318
−384.3−418.7635
per 1 mol of
−128.1−139.6212
per 1 mol of
−384.3−418.7635

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
CO (g)-110.525[1]-137.168[1]197.674[1]29.142[1]
CO (ao)-120.96[1]-119.90[1]104.6[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]
* (g):Gas, (ao):Un-ionized aqueous solution, (l):Liquid, (ai):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
N2O3 (l)50.29[1]
N2O3 (g)83.72[1]139.46[1]312.28[1]65.61[1]
CO2 (g)-393.509[1]-394.359[1]213.74[1]37.11[1]
CO2 (ao)-413.80[1]-385.98[1]117.6[1]
H2 (g)0[1]0[1]130.684[1]28.824[1]
H2 (ao)-4.2[1]17.6[1]577[1]
* (l):Liquid, (g):Gas, (ao):Un-ionized 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)