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PbBr2 🔥⚡→ Pb + Br2

Molten salt electrolysis of lead(II) bromide

Molten salt electrolysis of lead(II) bromide yields lead and bromine. 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 categories

Reaction data

Chemical equation

Molten salt electrolysis of lead(II) bromide

General equation

Molten salt electrolysis
SaltSelf redox agent
🔥⚡
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Molten salt electrolysis of lead(II) bromide

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
PbBr2Lead(II) bromide1
Self redox agent
Salt

Products

Chemical formulaNameCoefficientTypeType in general
equation
PbLead1
Reduced
Br2Bromine1
Oxidized

Thermodynamic changes

Changes in standard condition

Molten salt electrolysis of lead(II) bromide
ΔrG261.92 kJ/mol
K0.13 × 10−45
pK45.89
PbBr2Crystalline solid
🔥⚡
PbCrystalline solid + Br2Liquid
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
278.7261.9255.522.01
per 1 mol of
278.7261.9255.522.01
per 1 mol of
278.7261.9255.522.01
per 1 mol of
278.7261.9255.522.01

Changes in aqueous solution (1)

Molten salt electrolysis of lead(II) bromide
ΔrG236.27 kJ/mol
K0.40 × 10−41
pK41.39
PbBr2Ionized aqueous solution
🔥⚡
PbCrystalline solid + Br2Un-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
242.2236.2720.0
per 1 mol of
242.2236.2720.0
per 1 mol of
242.2236.2720.0
per 1 mol of
242.2236.2720.0

Changes in aqueous solution (2)

Molten salt electrolysis of lead(II) bromide
ΔrG244.5 kJ/mol
K0.15 × 10−42
pK42.83
PbBr2Un-ionized aqueous solution
🔥⚡
PbCrystalline solid + Br2Un-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
244.5
per 1 mol of
244.5
per 1 mol of
244.5
per 1 mol of
244.5

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
PbBr2 (cr)-278.7[1]-261.92[1]161.5[1]80.12[1]
PbBr2 (ai)-244.8[1]-232.34[1]175.3[1]
PbBr2 (ao)-240.6[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (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
Pb (cr)0[1]0[1]64.81[1]26.44[1]
Pb (g)195.0[1]161.9[1]175.373[1]20.786[1]
Br2 (cr)
Br2 (l)0[1]0[1]152.231[1]75.689[1]
Br2 (g)30.907[1]3.110[1]245.463[1]36.02[1]
Br2 (ao)-2.59[1]3.93[1]130.5[1]
* (cr):Crystalline solid, (g):Gas, (l):Liquid, (ao):Un-ionized aqueous solution

References

List of references

  1. 1