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2CH3COONa 🔥→ NaOH + 3CO↑ + NaH + CH4

Decomposition of sodium acetate yields sodium hydroxide, carbon monoxide, sodium hydride, and methane (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

Thermal decomposition with redox
Thermally decomposable substanceSelf redox agent
🔥
ProductOxidation product + ProductReduction product
Thermal decomposition of oxoacid salt with redox
Oxoacid saltSelf redox agent
🔥
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Decomposition of sodium acetate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
CH3COONaSodium acetate2
Oxidizing
Thermally decomposable
Oxoacid salt

Products

Chemical formulaNameCoefficientTypeType in general
equation
NaOHSodium hydroxide1
COCarbon monoxide3
Redoxed product
NaHSodium hydride1
Reduced
CH4Methane1
Reduced

Thermodynamic changes

Changes in standard condition

Decomposition of sodium acetate
ΔrG339.18 kJ/mol
K0.38 × 10−59
pK59.42
2CH3COONaCrystalline solid
🔥
NaOHCrystalline solid + 3COGas + NaHCrystalline solid + CH4Gas
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
529.35339.18637.858.9
per 1 mol of
264.68169.59318.929.4
per 1 mol of
529.35339.18637.858.9
per 1 mol of
176.45113.06212.619.6
per 1 mol of
529.35339.18637.858.9
per 1 mol of
529.35339.18637.858.9

Changes in aqueous solution (1)

Decomposition of sodium acetate
ΔrG347.57 kJ/mol
K0.13 × 10−60
pK60.89
2CH3COONaIonized aqueous solution
🔥
NaOHIonized aqueous solution + 3COGas + NaHCrystalline solid + CH4Gas
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
519.49347.57576.2−23.4
per 1 mol of
259.75173.78288.1−11.7
per 1 mol of
519.49347.57576.2−23.4
per 1 mol of
173.16115.86192.1−7.80
per 1 mol of
519.49347.57576.2−23.4
per 1 mol of
519.49347.57576.2−23.4

Changes in aqueous solution (2)

Decomposition of sodium acetate
ΔrG363.96 kJ/mol
K0.17 × 10−63
pK63.76
2CH3COONaIonized aqueous solution
🔥
NaOHIonized aqueous solution + 3COGas + NaHCrystalline solid + CH4Un-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
505.26363.96473.6
per 1 mol of
252.63181.98236.8
per 1 mol of
505.26363.96473.6
per 1 mol of
168.42121.32157.9
per 1 mol of
505.26363.96473.6
per 1 mol of
505.26363.96473.6

Changes in aqueous solution (3)

Decomposition of sodium acetate
ΔrG399.37 kJ/mol
K0.11 × 10−69
pK69.97
2CH3COONaIonized aqueous solution
🔥
NaOHIonized aqueous solution + 3COUn-ionized aqueous solution + NaHCrystalline solid + CH4Gas
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
488.18399.37297.0
per 1 mol of
244.09199.69148.5
per 1 mol of
488.18399.37297.0
per 1 mol of
162.73133.1299.00
per 1 mol of
488.18399.37297.0
per 1 mol of
488.18399.37297.0

Changes in aqueous solution (4)

Decomposition of sodium acetate
ΔrG415.76 kJ/mol
K0.15 × 10−72
pK72.84
2CH3COONaIonized aqueous solution
🔥
NaOHIonized aqueous solution + 3COUn-ionized aqueous solution + NaHCrystalline solid + CH4Un-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
473.95415.76194.4
per 1 mol of
236.97207.8897.20
per 1 mol of
473.95415.76194.4
per 1 mol of
157.98138.5964.80
per 1 mol of
473.95415.76194.4
per 1 mol of
473.95415.76194.4

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
CH3COONa (cr)-708.81[1]-607.18[1]123.0[1]79.9[1]
CH3COONa (ai)-726.13[1]-631.20[1]145.6[1]40.2[1]
CH3COONa (cr)
3 hydrate
-1603.3[1]-1328.6[1]243[1]
* (cr):Crystalline solid, (ai):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]
CO (g)-110.525[1]-137.168[1]197.674[1]29.142[1]
CO (ao)-120.96[1]-119.90[1]104.6[1]
NaH (cr)-56.275[1]-33.46[1]40.016[1]36.401[1]
NaH (g)130.25[1]108.85[1]188.377[1]30.29[1]
CH4 (g)-74.81[1]-50.72[1]186.264[1]35.309[1]
CH4 (ao)-89.04[1]-34.33[1]83.7[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)