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NH4NO3 🔥→ N2O↑ + 2H2O

Decomposition of ammonium nitrate yields dinitrotgen monoxide and water (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 ammonium nitrate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NH4NO3Ammonium nitrate1
Self redox agent
Thermally decomposable
Oxoacid salt

Products

Chemical formulaNameCoefficientTypeType in general
equation
N2ODinitrotgen monoxide1
Redoxed product
H2OWater2

Thermodynamic changes

Changes in standard condition

Decomposition of ammonium nitrate
ΔrG−186.19 kJ/mol
K4.16 × 1032
pK−32.62
NH4NO3Crystalline solid
🔥
N2OGas + 2H2OLiquid
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
−124.05−186.19208.5949.7
per 1 mol of
−124.05−186.19208.5949.7
−124.05−186.19208.5949.7
per 1 mol of
−62.025−93.095104.3024.9

Changes in aqueous solution (1)

Decomposition of ammonium nitrate
ΔrG−179.50 kJ/mol
K2.80 × 1031
pK−31.45
NH4NO3Ionized aqueous solution
🔥
N2OGas + 2H2OLiquid
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
−149.74−179.5099.9195.7
per 1 mol of
−149.74−179.5099.9195.7
−149.74−179.5099.9195.7
per 1 mol of
−74.870−89.75050.097.85

Changes in aqueous solution (2)

Decomposition of ammonium nitrate
NH4NO3Ionized aqueous solution
🔥
N2OAqueous solution + 2H2OLiquid
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
−175.7
per 1 mol of
−175.7
−175.7
per 1 mol of
−87.85

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
NH4NO3 (cr)-365.56[1]-183.87[1]151.08[1]139.3[1]
NH4NO3 (ai)-339.87[1]-190.56[1]259.8[1]-6.7[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
N2O (g)82.05[1]104.20[1]219.85[1]38.45[1]
N2O (aq)56.1[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]
* (g):Gas, (aq):Aqueous solution, (cr):Crystalline solid, (l):Liquid

References

List of references

  1. 1