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Cd + MnO2 → CdO + MnO

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Reaction of cadmium and manganese(IV) oxide
CdCadmium + MnO2Manganese(IV) oxide
⟶
CdOCadmium oxide + MnOManganese(II) oxide

The reaction of cadmium and manganese(IV) oxide yields cadmium oxide and manganese(II) oxide (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

Reaction of cadmium and manganese(IV) oxide
CdCadmium + MnO2Manganese(IV) oxide
⟶
CdOCadmium oxide + MnOManganese(II) oxide

General equation

Reaction of reducing species and reducible species
Reducing speciesReducing agent + Reducible speciesOxidizing agent
⟶
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of cadmium and manganese(IV) oxide

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
CdCadmium1
Reducing
Reducing
MnO2Manganese(IV) oxide1
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
CdOCadmium oxide1
Oxidized
–
MnOManganese(II) oxide1
Reduced
–

Thermodynamic changes

Changes in standard condition (1)

Reaction of cadmium and manganese(IV) oxide
◆
ΔrG−126.2 kJ/mol
K1.29 × 1022
pK−22.11
CdCrystalline solidγ + MnO2Crystalline solid
⟶
CdOCrystalline solid + MnOCrystalline solid
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
−123.4−126.29.78.75
per 1 mol of
−123.4−126.29.78.75
−123.4−126.29.78.75
per 1 mol of
−123.4−126.29.78.75
−123.4−126.29.78.75

Changes in standard condition (2)

Reaction of cadmium and manganese(IV) oxide
CdCrystalline solidγ + MnO2Amorphous solidprecipitated
⟶
CdOCrystalline solid + MnOCrystalline solid
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
−140.9–––
per 1 mol of
−140.9–––
−140.9–––
per 1 mol of
−140.9–––
−140.9–––

Changes in standard condition (3)

Reaction of cadmium and manganese(IV) oxide
◆
ΔrG−125.6 kJ/mol
K1.01 × 1022
pK−22.00
CdCrystalline solidα + MnO2Crystalline solid
⟶
CdOCrystalline solid + MnOCrystalline solid
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
−122.8−125.69.7–
per 1 mol of
−122.8−125.69.7–
−122.8−125.69.7–
per 1 mol of
−122.8−125.69.7–
−122.8−125.69.7–

Changes in standard condition (4)

Reaction of cadmium and manganese(IV) oxide
CdCrystalline solidα + MnO2Amorphous solidprecipitated
⟶
CdOCrystalline solid + MnOCrystalline solid
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
−140.3–––
per 1 mol of
−140.3–––
−140.3–––
per 1 mol of
−140.3–––
−140.3–––

Changes in aqueous solution

Reaction of cadmium and manganese(IV) oxide
◆
ΔrG−126.2 kJ/mol
K1.29 × 1022
pK−22.11
CdCrystalline solidγ + MnO2Crystalline solid
⟶
CdOCrystalline solid + MnOCrystalline solid
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
−123.4−126.29.78.75
per 1 mol of
−123.4−126.29.78.75
−123.4−126.29.78.75
per 1 mol of
−123.4−126.29.78.75
−123.4−126.29.78.75

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
Cd (cr)
γ
0[1]0[1]51.76[1]25.98[1]
Cd (cr)
α
-0.59[1]-0.59[1]51.76[1]–
Cd (g)112.01[1]77.41[1]167.746[1]20.786[1]
MnO2 (cr)-520.03[1]-465.14[1]53.05[1]54.14[1]
MnO2 (am)
precipitated
-502.5[1]–––
* (cr):Crystalline solid, (g):Gas, (am):Amorphous solid

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
CdO (cr)-258.2[1]-228.4[1]54.8[1]43.43[1]
MnO (cr)-385.22[1]-362.90[1]59.71[1]45.44[1]
MnO (g)124.22[1]–––
* (cr):Crystalline solid, (g):Gas

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)