2NH4ClO3 🔥|️☀️→ 2NH4Cl + 3O2↑
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- Decomposition of ammonium chlorate
Decomposition of ammonium chlorate yields ammonium chloride and (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
- Thermal decomposition with redox
- Thermal decomposition of oxoacid salt with redox
- Photolytic decomposition with redox
Table of contents
Reaction data
Chemical equation
- Decomposition of ammonium chlorate
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
- Photolytic decomposition with redox
- Photolytically decomposable substanceSelf redox agent️☀️⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Decomposition of ammonium chlorate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NH4ClO3 | Ammonium chlorate | 2 | Self redox agent | Thermally decomposable Oxoacid salt Photolytically decomposable |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NH4Cl | Ammonium chloride | 2 | Reduced | – |
| 3 | Oxidized | – |
Thermodynamic changes
Changes in aqueous solution (1)
- Decomposition of ammonium chlorate◆
ΔrG −246.52 kJ/mol K 1.54 × 1043 pK −43.19
| 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 | −126.36 | −246.52 | 403.8 | – |
per 1 mol of | −63.180 | −123.26 | 201.9 | – |
per 1 mol of | −63.180 | −123.26 | 201.9 | – |
| −42.120 | −82.173 | 134.6 | – |
Changes in aqueous solution (2)
- Decomposition of ammonium chlorate◆
ΔrG −197.3 kJ/mol K 3.68 × 1034 pK −34.57
| 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 | −161.5 | −197.3 | 121.1 | – |
per 1 mol of | −80.75 | −98.65 | 60.55 | – |
per 1 mol of | −80.75 | −98.65 | 60.55 | – |
| −53.83 | −65.77 | 40.37 | – |
Thermodynamic data of reactants
| Chemical formula | Standard 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 |
|---|---|---|---|---|
| NH4ClO3 (ai) | -236.48[1] | -87.26[1] | 275.7[1] | – |
* (ai):Ionized aqueous solution
Thermodynamic data of products
| Chemical formula | Standard 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 |
|---|---|---|---|---|
| NH4Cl (cr) | -314.43[1] | -202.87[1] | 94.6[1] | 84.1[1] |
| NH4Cl (ai) | -299.66[1] | -210.52[1] | 169.9[1] | -56.5[1] |
| (g) | 0[1] | 0[1] | 205.138[1] | 29.355[1] |
| (ao) | -11.7[1] | 16.4[1] | 110.9[1] | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution
References
List of references
- 1Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- ^ ΔfH°, -236.48 kJ · mol−1
- ^ ΔfG°, -87.26 kJ · mol−1
- ^ S°, 275.7 J · K−1 · mol−1
- ^ ΔfH°, -314.43 kJ · mol−1
- ^ ΔfG°, -202.87 kJ · mol−1
- ^ S°, 94.6 J · K−1 · mol−1
- ^ Cp°, 84.1 J · K−1 · mol−1
- ^ ΔfH°, -299.66 kJ · mol−1
- ^ ΔfG°, -210.52 kJ · mol−1
- ^ S°, 169.9 J · K−1 · mol−1
- ^ Cp°, -56.5 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 205.138 J · K−1 · mol−1
- ^ Cp°, 29.355 J · K−1 · mol−1
- ^ ΔfH°, -11.7 kJ · mol−1
- ^ ΔfG°, 16.4 kJ · mol−1
- ^ S°, 110.9 J · K−1 · mol−1