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9FeCl2 + 2MnO2 🔥→ 6FeCl3 + Fe3O4 + 2Mn

The reaction of iron(II) chloride and manganese(IV) oxide yields iron(III) chloride, iron(II,III) oxide, and manganese (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 reducible species
Oxidizable speciesReducing agent + Reducible speciesOxidizing agent
🔥
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
FeCl2Iron(II) chloride9
Reducing
Oxidizable
MnO2Manganese(IV) oxide2
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
FeCl3Iron(III) chloride6
Oxidized
Fe3O4Iron(II,III) oxide1
Oxidized
MnManganese2
Reduced

Thermodynamic changes

Changes in standard condition (1)

Reaction of iron(II) chloride and manganese(IV) oxide
ΔrG631.6 kJ/mol
K0.22 × 10−110
pK110.65
9FeCl2Crystalline solid + 2MnO2Crystalline solid
🔥
6FeCl3Crystalline solid + Fe3O4Crystalline solid + 2MnCrystalline solidα
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
600.8631.6−103.4−22.16
per 1 mol of
66.7670.18−11.49−2.462
300.4315.8−51.70−11.08
per 1 mol of
100.1105.3−17.23−3.693
per 1 mol of
600.8631.6−103.4−22.16
per 1 mol of
300.4315.8−51.70−11.08

Changes in standard condition (2)

Reaction of iron(II) chloride and manganese(IV) oxide
9FeCl2Crystalline solid + 2MnO2Crystalline solid
🔥
6FeCl3Crystalline solid + Fe3O4Crystalline solid + 2MnCrystalline solidβ
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
−98.7−21.74
per 1 mol of
−11.0−2.416
−49.4−10.87
per 1 mol of
−16.4−3.623
per 1 mol of
−98.7−21.74
per 1 mol of
−49.4−10.87

Changes in standard condition (3)

Reaction of iron(II) chloride and manganese(IV) oxide
ΔrG634.4 kJ/mol
K0.72 × 10−111
pK111.14
9FeCl2Crystalline solid + 2MnO2Crystalline solid
🔥
6FeCl3Crystalline solid + Fe3O4Crystalline solid + 2MnCrystalline solidγ
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
603.9634.4−102.6−19.66
per 1 mol of
67.1070.49−11.40−2.184
301.9317.2−51.30−9.830
per 1 mol of
100.6105.7−17.10−3.277
per 1 mol of
603.9634.4−102.6−19.66
per 1 mol of
301.9317.2−51.30−9.830

Changes in standard condition (4)

Reaction of iron(II) chloride and manganese(IV) oxide
9FeCl2Crystalline solid + 2MnO2Amorphous solidprecipitated
🔥
6FeCl3Crystalline solid + Fe3O4Crystalline solid + 2MnCrystalline solidα
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
565.8
per 1 mol of
62.87
282.9
per 1 mol of
94.30
per 1 mol of
565.8
per 1 mol of
282.9

Changes in standard condition (5)

Reaction of iron(II) chloride and manganese(IV) oxide
9FeCl2Crystalline solid + 2MnO2Amorphous solidprecipitated
🔥
6FeCl3Crystalline solid + Fe3O4Crystalline solid + 2MnCrystalline solidβ
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
per 1 mol of
per 1 mol of
per 1 mol of
per 1 mol of

Changes in standard condition (6)

Reaction of iron(II) chloride and manganese(IV) oxide
9FeCl2Crystalline solid + 2MnO2Amorphous solidprecipitated
🔥
6FeCl3Crystalline solid + Fe3O4Crystalline solid + 2MnCrystalline solidγ
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
568.9
per 1 mol of
63.21
284.4
per 1 mol of
94.82
per 1 mol of
568.9
per 1 mol of
284.4

Changes in aqueous solution (1)

Reaction of iron(II) chloride and manganese(IV) oxide
ΔrG−0.2 kJ/mol
K1.08 × 100
pK−0.04
9FeCl2Un-ionized aqueous solution + 2MnO2Crystalline solid
🔥
6FeCl3Un-ionized aqueous solution + Fe3O4Crystalline solid + 2MnCrystalline solidα
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
−0.2
per 1 mol of
−0.022
−0.10
per 1 mol of
−0.033
per 1 mol of
−0.20
per 1 mol of
−0.10

Changes in aqueous solution (2)

Reaction of iron(II) chloride and manganese(IV) oxide
ΔrG37.0 kJ/mol
K0.33 × 10−6
pK6.48
9FeCl2Un-ionized aqueous solution + 2MnO2Crystalline solid
🔥
6FeCl3Ionized aqueous solution + Fe3O4Crystalline solid + 2MnCrystalline solidα
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
37.0
per 1 mol of
4.11
18.5
per 1 mol of
6.17
per 1 mol of
37.0
per 1 mol of
18.5

Changes in aqueous solution (3)

Reaction of iron(II) chloride and manganese(IV) oxide
ΔrG559.9 kJ/mol
K0.81 × 10−98
pK98.09
9FeCl2Ionized aqueous solution + 2MnO2Crystalline solid
🔥
6FeCl3Un-ionized aqueous solution + Fe3O4Crystalline solid + 2MnCrystalline solidα
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
559.9
per 1 mol of
62.21
279.9
per 1 mol of
93.32
per 1 mol of
559.9
per 1 mol of
279.9

Changes in aqueous solution (4)

Reaction of iron(II) chloride and manganese(IV) oxide
ΔrG597.1 kJ/mol
K0.25 × 10−104
pK104.61
9FeCl2Ionized aqueous solution + 2MnO2Crystalline solid
🔥
6FeCl3Ionized aqueous solution + Fe3O4Crystalline solid + 2MnCrystalline solidα
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
431.1597.1−551.8
per 1 mol of
47.9066.34−61.31
215.6298.6−275.9
per 1 mol of
71.8599.52−91.97
per 1 mol of
431.1597.1−551.8
per 1 mol of
215.6298.6−275.9

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
FeCl2 (cr)-341.79[1]-302.30[1]117.95[1]76.65[1]
FeCl2 (g)-148.5[1]
FeCl2 (ai)-423.4[1]-341.34[1]-24.7[1]
FeCl2 (ao)-279.1[1]
FeCl2 (cr)
2 hydrate
-953.1[1]
FeCl2 (cr)
4 hydrate
-1549.3[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, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (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
FeCl3 (cr)-399.49[1]-334.00[1]142.3[1]96.65[1]
FeCl3 (g)-254.0[1]
FeCl3 (ai)-550.2[1]-398.3[1]-146.4[1]
FeCl3 (ao)-404.5[1]
FeCl3 (cr)
6 hydrate
-2223.8[1]
Fe3O4 (cr)-1118.4[1]-1015.4[1]146.4[1]143.43[1]
Mn (cr)
α
0[1]0[1]32.01[1]26.32[1]
Mn (cr)
β
34.39[1]26.53[1]
Mn (cr)
γ
1.55[1]1.42[1]32.43[1]27.57[1]
Mn (g)280.7[1]238.5[1]173.70[1]20.79[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (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)