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3CH3COONH4 🔥→ CO↑ + 5H2O + 3HCN + 2CH4↑

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Decomposition of ammonium acetate
3CH3COONH4Ammonium acetate
🔥
⟶
CO↑Carbon monoxide + 5H2OWater + 3HCNHydrogen cyanide + 2CH4↑Methane

Decomposition of ammonium acetate yields carbon monoxide, water, hydrogen cyanide, 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

Decomposition of ammonium acetate
3CH3COONH4Ammonium acetate
🔥
⟶
CO↑Carbon monoxide + 5H2OWater + 3HCNHydrogen cyanide + 2CH4↑Methane

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 ammonium acetate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
CH3COONH4Ammonium acetate3
Oxidizing
Thermally decomposable
Oxoacid salt

Products

Chemical formulaNameCoefficientTypeType in general
equation
COCarbon monoxide1
Reduced
–
H2OWater5
–
–
HCNHydrogen cyanide3
Redoxed product
–
CH4Methane2
Reduced
–

Thermodynamic changes

Changes in standard condition

Decomposition of ammonium acetate
3CH3COONH4Crystalline solid
🔥
⟶
CO↑Gas + 5H2OLiquid + 3HCNLiquid + 2CH4↑Gas
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
485.74–––
per 1 mol of
161.91–––
per 1 mol of
485.74–––
per 1 mol of
97.148–––
per 1 mol of
161.91–––
per 1 mol of
242.87–––

Changes in aqueous solution (1)

Decomposition of ammonium acetate
◆
ΔrG280.7 kJ/mol
K0.67 × 10−49
pK49.18
3CH3COONH4Ionized aqueous solution
🔥
⟶
CO↑Gas + 5H2OLiquid + 3HCNUn-ionized aqueous solution + 2CH4↑Gas
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
487.6280.7693.9–
per 1 mol of
162.593.57231.3–
per 1 mol of
487.6280.7693.9–
per 1 mol of
97.5256.14138.8–
per 1 mol of
162.593.57231.3–
per 1 mol of
243.8140.3346.9–

Changes in aqueous solution (2)

Decomposition of ammonium acetate
◆
ΔrG313.5 kJ/mol
K0.12 × 10−54
pK54.92
3CH3COONH4Ionized aqueous solution
🔥
⟶
CO↑Gas + 5H2OLiquid + 3HCNUn-ionized aqueous solution + 2CH4↑Un-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
459.1313.5488.7–
per 1 mol of
153.0104.5162.9–
per 1 mol of
459.1313.5488.7–
per 1 mol of
91.8262.7097.74–
per 1 mol of
153.0104.5162.9–
per 1 mol of
229.6156.8244.3–

Changes in aqueous solution (3)

Decomposition of ammonium acetate
◆
ΔrG297.9 kJ/mol
K0.65 × 10−52
pK52.19
3CH3COONH4Ionized aqueous solution
🔥
⟶
CO↑Un-ionized aqueous solution + 5H2OLiquid + 3HCNUn-ionized aqueous solution + 2CH4↑Gas
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
477.1297.9600.8–
per 1 mol of
159.099.30200.3–
per 1 mol of
477.1297.9600.8–
per 1 mol of
95.4259.58120.2–
per 1 mol of
159.099.30200.3–
per 1 mol of
238.6148.9300.4–

Changes in aqueous solution (4)

Decomposition of ammonium acetate
◆
ΔrG330.7 kJ/mol
K0.12 × 10−57
pK57.94
3CH3COONH4Ionized aqueous solution
🔥
⟶
CO↑Un-ionized aqueous solution + 5H2OLiquid + 3HCNUn-ionized aqueous solution + 2CH4↑Un-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
448.7330.7395.7–
per 1 mol of
149.6110.2131.9–
per 1 mol of
448.7330.7395.7–
per 1 mol of
89.7466.1479.14–
per 1 mol of
149.6110.2131.9–
per 1 mol of
224.3165.3197.8–

Changes in aqueous solution (5)

Decomposition of ammonium acetate
◆
ΔrG438.8 kJ/mol
K0.13 × 10−76
pK76.87
3CH3COONH4Ionized aqueous solution
🔥
⟶
CO↑Gas + 5H2OLiquid + 3HCNIonized aqueous solution + 2CH4↑Gas
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
618.1438.8602.1–
per 1 mol of
206.0146.3200.7–
per 1 mol of
618.1438.8602.1–
per 1 mol of
123.687.76120.4–
per 1 mol of
206.0146.3200.7–
per 1 mol of
309.1219.4301.1–

Changes in aqueous solution (6)

Decomposition of ammonium acetate
◆
ΔrG471.6 kJ/mol
K0.24 × 10−82
pK82.62
3CH3COONH4Ionized aqueous solution
🔥
⟶
CO↑Gas + 5H2OLiquid + 3HCNIonized aqueous solution + 2CH4↑Un-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
589.6471.6396.9–
per 1 mol of
196.5157.2132.3–
per 1 mol of
589.6471.6396.9–
per 1 mol of
117.994.3279.38–
per 1 mol of
196.5157.2132.3–
per 1 mol of
294.8235.8198.4–

Changes in aqueous solution (7)

Decomposition of ammonium acetate
◆
ΔrG456.0 kJ/mol
K0.13 × 10−79
pK79.89
3CH3COONH4Ionized aqueous solution
🔥
⟶
CO↑Un-ionized aqueous solution + 5H2OLiquid + 3HCNIonized aqueous solution + 2CH4↑Gas
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
607.6456.0509.0–
per 1 mol of
202.5152.0169.7–
per 1 mol of
607.6456.0509.0–
per 1 mol of
121.591.20101.8–
per 1 mol of
202.5152.0169.7–
per 1 mol of
303.8228.0254.5–

Changes in aqueous solution (8)

Decomposition of ammonium acetate
◆
ΔrG488.8 kJ/mol
K0.23 × 10−85
pK85.63
3CH3COONH4Ionized aqueous solution
🔥
⟶
CO↑Un-ionized aqueous solution + 5H2OLiquid + 3HCNIonized aqueous solution + 2CH4↑Un-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
579.2488.8303.9–
per 1 mol of
193.1162.9101.3–
per 1 mol of
579.2488.8303.9–
per 1 mol of
115.897.7660.78–
per 1 mol of
193.1162.9101.3–
per 1 mol of
289.6244.4151.9–

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
CH3COONH4 (cr)-616.14[1]–––
CH3COONH4 (ai)-618.52[1]-448.61[1]200.0[1]73.6[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
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]–
H2O (cr)––––
H2O (l)-285.830[1]-237.129[1]69.91[1]75.291[1]
H2O (g)-241.818[1]-228.572[1]188.825[1]33.577[1]
HCN (l)108.87[1]124.97[1]112.84[1]70.63[1]
HCN (g)135.1[1]124.7[1]201.78[1]35.86[1]
HCN (ai)150.6[1]172.4[1]94.1[1]–
HCN (ao)107.1[1]119.7[1]124.7[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]–
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (l):Liquid, (ai):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)