You-iggy

3MnO + 2HNO3 → 3MnO2 + 2NO↑ + H2O

The reaction of manganese(II) oxide and nitric acid yields manganese(IV) oxide, nitrogen monoxide, and water (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 oxidizable species and oxidizing species
Oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
MnOManganese(II) oxide3
Reducing
Oxidizable
HNO3Nitric acid2
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
MnO2Manganese(IV) oxide3
Oxidized
NONitrogen monoxide2
Reduced
H2OWater1

Thermodynamic changes

Changes in standard condition (1)

Reaction of manganese(II) oxide and nitric acid
ΔrG−209.33 kJ/mol
K4.71 × 1036
pK−36.67
3MnOCrystalline solid + 2HNO3Liquid
3MnO2Crystalline solid + 2NOGas + H2OLiquid
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
−161.56−209.33160.25−58.66
−53.853−69.77753.417−19.55
per 1 mol of
−80.780−104.6780.125−29.33
−53.853−69.77753.417−19.55
per 1 mol of
−80.780−104.6780.125−29.33
per 1 mol of
−161.56−209.33160.25−58.66

Changes in standard condition (2)

Reaction of manganese(II) oxide and nitric acid
3MnOCrystalline solid + 2HNO3Liquid
3MnO2Amorphous solidprecipitated + 2NOGas + H2OLiquid
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
−109.0
−36.33
per 1 mol of
−54.50
−36.33
per 1 mol of
−54.50
per 1 mol of
−109.0

Changes in aqueous solution

Reaction of manganese(II) oxide and nitric acid
ΔrG−148.25 kJ/mol
K9.38 × 1025
pK−25.97
3MnOCrystalline solid + 2HNO3Ionized aqueous solution
3MnO2Crystalline solid + 2NOGas + H2OLiquid
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
−95.04−148.25178.7334.3
−31.68−49.41759.57111.4
per 1 mol of
−47.52−74.12589.35167.2
−31.68−49.41759.57111.4
per 1 mol of
−47.52−74.12589.35167.2
per 1 mol of
−95.04−148.25178.7334.3

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
MnO (cr)-385.22[1]-362.90[1]59.71[1]45.44[1]
MnO (g)124.22[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]
* (cr):Crystalline solid, (g):Gas, (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
MnO2 (cr)-520.03[1]-465.14[1]53.05[1]54.14[1]
MnO2 (am)
precipitated
-502.5[1]
NO (g)90.25[1]86.55[1]210.761[1]29.844[1]
H2O (cr)
H2O (l)-285.830[1]-237.129[1]69.91[1]75.291[1]
H2O (g)-241.818[1]-228.572[1]188.825[1]33.577[1]
* (cr):Crystalline solid, (am):Amorphous solid, (g):Gas, (l):Liquid

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)