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NaHCO3 💧⚡→ NaOH + O2↑ + C

Electrolysis of aqueous sodium hydrogencarbonate without water as reactant

Electrolysis of aqueous sodium hydrogencarbonate yields sodium hydroxide, oxygen, and carbon (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

Electrolysis of aqueous sodium hydrogencarbonate without water as reactant

General equation

Electrolysis of aqueous solution without water as reactant
Miscible with water/Very soluble in water/Soluble in waterSelf redox agent
💧⚡
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Electrolysis of aqueous sodium hydrogencarbonate without water as reactant

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NaHCO3Sodium hydrogencarbonate1
Self redox agent
Soluble in water

Products

Chemical formulaNameCoefficientTypeType in general
equation
NaOHSodium hydroxide1
O2Oxygen1
Oxidized
CCarbon1
Reduced

Thermodynamic changes

Changes in standard condition (1)

Electrolysis of aqueous sodium hydrogencarbonate without water as reactant
ΔrG471.5 kJ/mol
K0.25 × 10−82
pK82.60
NaHCO3Crystalline solid
💧⚡
NaOHCrystalline solid + O2Gas + CCrystalline solidgraphite
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
525.20471.5173.69.81
525.20471.5173.69.81
per 1 mol of
525.20471.5173.69.81
per 1 mol of
525.20471.5173.69.81
per 1 mol of
525.20471.5173.69.81

Changes in standard condition (2)

Electrolysis of aqueous sodium hydrogencarbonate without water as reactant
ΔrG474.4 kJ/mol
K0.77 × 10−83
pK83.11
NaHCO3Crystalline solid
💧⚡
NaOHCrystalline solid + O2Gas + CCrystalline soliddiamond
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
527.10474.4170.37.40
527.10474.4170.37.40
per 1 mol of
527.10474.4170.37.40
per 1 mol of
527.10474.4170.37.40
per 1 mol of
527.10474.4170.37.40

Changes in aqueous solution (1)

Electrolysis of aqueous sodium hydrogencarbonate without water as reactant
ΔrG429.51 kJ/mol
K0.57 × 10−75
pK75.25
NaHCO3Ionized aqueous solution
💧⚡
NaOHIonized aqueous solution + O2Gas + CCrystalline solidgraphite
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
462.00429.51108.8
462.00429.51108.8
per 1 mol of
462.00429.51108.8
per 1 mol of
462.00429.51108.8
per 1 mol of
462.00429.51108.8

Changes in aqueous solution (2)

Electrolysis of aqueous sodium hydrogencarbonate without water as reactant
ΔrG445.9 kJ/mol
K0.76 × 10−78
pK78.12
NaHCO3Ionized aqueous solution
💧⚡
NaOHIonized aqueous solution + O2Un-ionized aqueous solution + CCrystalline solidgraphite
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
450.3445.914.5
450.3445.914.5
per 1 mol of
450.3445.914.5
per 1 mol of
450.3445.914.5
per 1 mol of
450.3445.914.5

Changes in aqueous solution (3)

Electrolysis of aqueous sodium hydrogencarbonate without water as reactant
ΔrG430.6 kJ/mol
K0.36 × 10−75
pK75.44
NaHCO3Un-ionized aqueous solution
💧⚡
NaOHIonized aqueous solution + O2Gas + CCrystalline solidgraphite
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
473.8430.6145.2
473.8430.6145.2
per 1 mol of
473.8430.6145.2
per 1 mol of
473.8430.6145.2
per 1 mol of
473.8430.6145.2

Changes in aqueous solution (4)

Electrolysis of aqueous sodium hydrogencarbonate without water as reactant
ΔrG447.0 kJ/mol
K0.49 × 10−78
pK78.31
NaHCO3Un-ionized aqueous solution
💧⚡
NaOHIonized aqueous solution + O2Un-ionized aqueous solution + CCrystalline solidgraphite
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
462.1447.050.9
462.1447.050.9
per 1 mol of
462.1447.050.9
per 1 mol of
462.1447.050.9
per 1 mol of
462.1447.050.9

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
NaHCO3 (cr)-950.81[1]-851.0[1]101.7[1]87.61[1]
NaHCO3 (ai)-932.11[1]-848.66[1]150.2[1]
NaHCO3 (ao)-943.9[1]-849.7[1]113.8[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
NaOH (cr)-425.609[1]-379.494[1]64.455[1]59.54[1]
NaOH (g)-207.1[1]-210.0[1]228.43[1]48.37[1]
NaOH (ai)-470.114[1]-419.150[1]48.1[1]-102.1[1]
NaOH (cr)
1 hydrate
-734.543[1]-629.338[1]99.50[1]90.17[1]
NaOH (l)
2 hydrate
-1019.076[1]-873.091[1]195.979[1]239.41[1]
NaOH (l)
3.5 hydrate
-1459.798[1]-1236.356[1]286.089[1]354.43[1]
NaOH (l)
4 hydrate
-1605.15[1]-1356.64[1]318.70[1]
NaOH (l)
5 hydrate
-1894.31[1]-1596.34[1]386.06[1]
NaOH (l)
7 hydrate
-2469.02[1]-2073.80[1]526.31[1]
O2 (g)0[1]0[1]205.138[1]29.355[1]
O2 (ao)-11.7[1]16.4[1]110.9[1]
C (cr)
graphite
0[1]0[1]5.740[1]8.527[1]
C (cr)
diamond
1.895[1]2.900[1]2.377[1]6.113[1]
C (g)716.682[1]671.257[1]158.096[1]20.838[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (l):Liquid, (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)