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2FeSiO3 ๐Ÿ”ฅโ†’ 2Fe + O2โ†‘ + 2SiO2

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Decomposition of iron(II) metasilicate
2FeSiO3Iron(II) metasilicate
๐Ÿ”ฅ
โŸถ
2FeIron + O2โ†‘Oxygen + 2SiO2Silicon dioxide

Decomposition of iron(II) metasilicate yields iron, oxygen, and 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

Decomposition of iron(II) metasilicate
2FeSiO3Iron(II) metasilicate
๐Ÿ”ฅ
โŸถ
2FeIron + O2โ†‘Oxygen + 2SiO2Silicon dioxide

General equation

Thermal decomposition with redox
Thermally decomposable substanceSelf redox agent
๐Ÿ”ฅ
โŸถ
ProductOxidation product + ProductReduction product
Thermal decomposition of oxoacid salt with redox
Oxoacid saltSelf redox agent
๐Ÿ”ฅ
โŸถ
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Decomposition of iron(II) metasilicate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
FeSiO3Iron(II) metasilicate2
Self redox agent
Thermally decomposable
Oxoacid salt

Products

Chemical formulaNameCoefficientTypeType in general
equation
FeIron2
Reduced
โ€“
O2Oxygen1
Oxidized
โ€“
SiO2Silicon dioxide2
โ€“
โ€“

Thermodynamic changes

Changes in standard condition (1)

Decomposition of iron(II) metasilicate
2FeSiO3Crystalline solid
๐Ÿ”ฅ
โŸถ
2FeCrystalline solid + O2โ†‘Gas + 2SiO2Crystalline solidฮฑ-quartz
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
588โ€“โ€“โ€“
294โ€“โ€“โ€“
per 1 mol of
294โ€“โ€“โ€“
per 1 mol of
588โ€“โ€“โ€“
per 1 mol of
294โ€“โ€“โ€“

Changes in standard condition (2)

Decomposition of iron(II) metasilicate
2FeSiO3Crystalline solid
๐Ÿ”ฅ
โŸถ
2FeCrystalline solid + O2โ†‘Gas + 2SiO2Crystalline solidฮฑ-cristobalite
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
591โ€“โ€“โ€“
296โ€“โ€“โ€“
per 1 mol of
296โ€“โ€“โ€“
per 1 mol of
591โ€“โ€“โ€“
per 1 mol of
296โ€“โ€“โ€“

Changes in standard condition (3)

Decomposition of iron(II) metasilicate
2FeSiO3Crystalline solid
๐Ÿ”ฅ
โŸถ
2FeCrystalline solid + O2โ†‘Gas + 2SiO2Crystalline solidฮฑ-tridymite
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
592โ€“โ€“โ€“
296โ€“โ€“โ€“
per 1 mol of
296โ€“โ€“โ€“
per 1 mol of
592โ€“โ€“โ€“
per 1 mol of
296โ€“โ€“โ€“

Changes in standard condition (4)

Decomposition of iron(II) metasilicate
2FeSiO3Crystalline solid
๐Ÿ”ฅ
โŸถ
2FeCrystalline solid + O2โ†‘Gas + 2SiO2Amorphous solid
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
603โ€“โ€“โ€“
302โ€“โ€“โ€“
per 1 mol of
302โ€“โ€“โ€“
per 1 mol of
603โ€“โ€“โ€“
per 1 mol of
302โ€“โ€“โ€“

Changes in aqueous solution (1)

Decomposition of iron(II) metasilicate
2FeSiO3Crystalline solid
๐Ÿ”ฅ
โŸถ
2FeCrystalline solid + O2โ†‘Gas + 2SiO2Un-ionized aqueous solution
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
616โ€“โ€“โ€“
308โ€“โ€“โ€“
per 1 mol of
308โ€“โ€“โ€“
per 1 mol of
616โ€“โ€“โ€“
per 1 mol of
308โ€“โ€“โ€“

Changes in aqueous solution (2)

Decomposition of iron(II) metasilicate
2FeSiO3Crystalline solid
๐Ÿ”ฅ
โŸถ
2FeCrystalline solid + O2โ†‘Un-ionized aqueous solution + 2SiO2Un-ionized aqueous solution
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
604โ€“โ€“โ€“
302โ€“โ€“โ€“
per 1 mol of
302โ€“โ€“โ€“
per 1 mol of
604โ€“โ€“โ€“
per 1 mol of
302โ€“โ€“โ€“

Thermodynamic data of reactants

Chemical formulaStandard enthalpy
of formation
ฮ”fHยฐ
kJ ยท molโˆ’1		Standard Gibbs
energy of
formation
ฮ”fGยฐ
kJ ยท molโˆ’1		Standard
molar entropy
Sยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard molar
heat capacity at
constant pressure
Cpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
FeSiO3 (cr)-1205[1]โ€“โ€“โ€“
* (cr):Crystalline solid

Thermodynamic data of products

Chemical formulaStandard enthalpy
of formation
ฮ”fHยฐ
kJ ยท molโˆ’1		Standard Gibbs
energy of
formation
ฮ”fGยฐ
kJ ยท molโˆ’1		Standard
molar entropy
Sยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard molar
heat capacity at
constant pressure
Cpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
Fe (cr)0[1]0[1]27.28[1]25.10[1]
Fe (g)416.3[1]370.7[1]180.490[1]25.677[1]
O2 (g)0[1]0[1]205.138[1]29.355[1]
O2 (ao)-11.7[1]16.4[1]110.9[1]โ€“
SiO2 (cr)
ฮฑ-quartz
-910.94[1]-856.64[1]41.84[1]44.43[1]
SiO2 (cr)
ฮฑ-cristobalite
-909.48[1]-855.43[1]42.68[1]44.18[1]
SiO2 (cr)
ฮฑ-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]โ€“โ€“โ€“
SiO2 (ao)-897.0[1]โ€“โ€“โ€“
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution, (am):Amorphous solid

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)