2CH3COONH4 🔥→ N2O4 + 4C + 7H2↑
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- Decomposition of ammonium acetate
Decomposition of ammonium acetate yields dinitrogen tetraoxide, , and (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Decomposition of ammonium acetate
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 formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
CH3COONH4 | Ammonium acetate | 2 | Self redox agent | Thermally decomposable Oxoacid salt |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
N2O4 | Dinitrogen tetraoxide | 1 | Oxidized | – |
4 | Redoxed product | – | ||
7 | Reduced | – |
Thermodynamic changes
Changes in standard condition (1)
- Decomposition of ammonium acetate
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 | 1212.78 | – | – | – |
per 1 mol of | 606.390 | – | – | – |
per 1 mol of | 1212.78 | – | – | – |
303.195 | – | – | – | |
173.254 | – | – | – |
Changes in standard condition (2)
- Decomposition of ammonium acetate
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 | 1220.36 | – | – | – |
per 1 mol of | 610.180 | – | – | – |
per 1 mol of | 1220.36 | – | – | – |
305.090 | – | – | – | |
174.337 | – | – | – |
Changes in aqueous solution (1)
- Decomposition of ammonium acetate◆
ΔrG 994.76 kJ/mol K 0.53 × 10−174 pK 174.27
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 | 1217.54 | 994.76 | 746.9 | 231.4 |
per 1 mol of | 608.770 | 497.38 | 373.4 | 115.7 |
per 1 mol of | 1217.54 | 994.76 | 746.9 | 231.4 |
304.385 | 248.69 | 186.7 | 57.85 | |
173.934 | 142.11 | 106.7 | 33.06 |
Changes in aqueous solution (2)
- Decomposition of ammonium acetate◆
ΔrG 1118.0 kJ/mol K 0.14 × 10−195 pK 195.87
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 | 1188.1 | 1118.0 | 3871 | – |
per 1 mol of | 594.05 | 559.00 | 1936 | – |
per 1 mol of | 1188.1 | 1118.0 | 3871 | – |
297.02 | 279.50 | 967.8 | – | |
169.73 | 159.71 | 553.0 | – |
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 |
---|---|---|---|---|
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 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 |
---|---|---|---|---|
N2O4 (l) | -19.50[1] | 97.54[1] | 209.2[1] | 142.7[1] |
N2O4 (g) | 9.16[1] | 97.89[1] | 304.29[1] | 77.28[1] |
(cr) graphite | 0[1] | 0[1] | 5.740[1] | 8.527[1] |
(cr) diamond | 1.895[1] | 2.900[1] | 2.377[1] | 6.113[1] |
(g) | 716.682[1] | 671.257[1] | 158.096[1] | 20.838[1] |
(g) | 0[1] | 0[1] | 130.684[1] | 28.824[1] |
(ao) | -4.2[1] | 17.6[1] | 577[1] | – |
* (l):Liquid, (g):Gas, (cr):Crystalline solid, (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°, -616.14 kJ · mol−1
- ^ ΔfH°, -618.52 kJ · mol−1
- ^ ΔfG°, -448.61 kJ · mol−1
- ^ S°, 200.0 J · K−1 · mol−1
- ^ Cp°, 73.6 J · K−1 · mol−1
- ^ ΔfH°, -19.50 kJ · mol−1
- ^ ΔfG°, 97.54 kJ · mol−1
- ^ S°, 209.2 J · K−1 · mol−1
- ^ Cp°, 142.7 J · K−1 · mol−1
- ^ ΔfH°, 9.16 kJ · mol−1
- ^ ΔfG°, 97.89 kJ · mol−1
- ^ S°, 304.29 J · K−1 · mol−1
- ^ Cp°, 77.28 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 5.740 J · K−1 · mol−1
- ^ Cp°, 8.527 J · K−1 · mol−1
- ^ ΔfH°, 1.895 kJ · mol−1
- ^ ΔfG°, 2.900 kJ · mol−1
- ^ S°, 2.377 J · K−1 · mol−1
- ^ Cp°, 6.113 J · K−1 · mol−1
- ^ ΔfH°, 716.682 kJ · mol−1
- ^ ΔfG°, 671.257 kJ · mol−1
- ^ S°, 158.096 J · K−1 · mol−1
- ^ Cp°, 20.838 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 130.684 J · K−1 · mol−1
- ^ Cp°, 28.824 J · K−1 · mol−1
- ^ ΔfH°, -4.2 kJ · mol−1
- ^ ΔfG°, 17.6 kJ · mol−1
- ^ S°, 577 J · K−1 · mol−1