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2Fe3O4 + 9I2 🔥→ 6FeI3 + 4O2

The reaction of iron(II,III) oxide and iodine yields iron(III) iodide and oxygen (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

Reaction of iron(II,III) oxide and iodine

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Fe3O4Iron(II,III) oxide2
Reducing
Oxidizable
I2Iodine9
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
FeI3Iron(III) iodide6
Redoxed product
O2Oxygen4
Oxidized

Thermodynamic changes

Changes in aqueous solution (1)

Reaction of iron(II,III) oxide and iodine
ΔrG926.8 kJ/mol
K0.43 × 10−162
pK162.37
2Fe3O4Crystalline solid + 9I2Un-ionized aqueous solution
🔥
6FeI3Ionized aqueous solution + 4O2Gas
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
748.2926.8−599.0
per 1 mol of
374.1463.4−299.5
per 1 mol of
83.13103.0−66.56
per 1 mol of
124.7154.5−99.83
per 1 mol of
187.1231.7−149.8

Changes in aqueous solution (2)

Reaction of iron(II,III) oxide and iodine
ΔrG992.4 kJ/mol
K0.14 × 10−173
pK173.86
2Fe3O4Crystalline solid + 9I2Un-ionized aqueous solution
🔥
6FeI3Ionized aqueous solution + 4O2Un-ionized aqueous solution
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
701.4992.4−976.0
per 1 mol of
350.7496.2−488.0
per 1 mol of
77.93110.3−108.4
per 1 mol of
116.9165.4−162.7
per 1 mol of
175.3248.1−244.0

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
Fe3O4 (cr)-1118.4[1]-1015.4[1]146.4[1]143.43[1]
I2 (cr)0[1]0[1]116.135[1]54.438[1]
I2 (g)62.438[1]19.327[1]260.69[1]36.90[1]
I2 (ao)22.6[1]16.40[1]137.2[1]
* (cr):Crystalline solid, (g):Gas, (ao):Un-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
FeI3 (g)71[1]
FeI3 (ai)-214.2[1]-159.4[1]18.0[1]
O2 (g)0[1]0[1]205.138[1]29.355[1]
O2 (ao)-11.7[1]16.4[1]110.9[1]
* (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution

References

List of references

  1. 1