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2MnSiO3 → MnO2 + Mn4+ + 2SiO2 + 4e

Oxidation of manganese(II) metasilicate yields manganese(IV) oxide, manganese(IV) ion, silicon 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

Oxidation of oxidizable species
ReactantReducing agent
ProductOxidation product + e

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
MnSiO3Manganese(II) metasilicate2
Reducing

Products

Chemical formulaNameCoefficientTypeType in general
equation
MnO2Manganese(IV) oxide1
Oxidized
Mn4+Manganese(IV) ion1
Oxidized
SiO2Silicon dioxide2
eElectron4
Electron

Thermodynamic changes

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
MnSiO3 (cr)-1320.9[1]-1240.5[1]89.1[1]86.44[1]
MnSiO3 (vit)-1285.3[1]
* (cr):Crystalline solid, (vit):Vitreous liquid

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]
Mn4+
SiO2 (cr)
α-quartz
-910.94[1]-856.64[1]41.84[1]44.43[1]
SiO2 (cr)
α-cristobalite
-909.48[1]-855.43[1]42.68[1]44.18[1]
SiO2 (cr)
α-tridymite
-909.06[1]-855.26[1]43.5[1]44.60[1]
SiO2 (am)-903.49[1]-850.70[1]46.9[1]44.4[1]
SiO2 (g)-322[1]
SiO2 (ao)-897.0[1]
e
* (cr):Crystalline solid, (am):Amorphous solid, (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1