5N2O3 🔥|🕒→ 3N2O5 + 2N2
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- Decomposition of dinitrogen trioxide
Decomposition of dinitrogen trioxide yields dinitrogen pentaoxide 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 dinitrogen trioxide
General equation
- Thermal decomposition with redox
- Thermally decomposable substanceSelf redox agent🔥⟶ ProductOxidation product + ProductReduction product
- Spontaneous decomposition with redox
- Spontaneously decomposable substanceSelf redox agent🕒⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Decomposition of dinitrogen trioxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| N2O3 | Dinitrogen trioxide | 5 | – | Thermally decomposable Spontaneously decomposable |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| N2O5 | Dinitrogen pentaoxide | 3 | Oxidized | – |
| 2 | Reduced | – |
Thermodynamic changes
Changes in standard condition
- Decomposition of dinitrogen trioxide◆
ΔrG −355.6 kJ/mol K 1.99 × 1062 pK −62.30
| 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 | −547.9 | −355.6 | −643.6 | 159.5 |
per 1 mol of | −109.6 | −71.12 | −128.7 | 31.90 |
per 1 mol of | −182.6 | −118.5 | −214.5 | 53.17 |
| −273.9 | −177.8 | −321.8 | 79.75 |
Changes in aqueous solution
- Decomposition of dinitrogen trioxide
| 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 | −380.8 | – | – | – |
per 1 mol of | −76.16 | – | – | – |
per 1 mol of | −126.9 | – | – | – |
| −190.4 | – | – | – |
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 |
|---|---|---|---|---|
| N2O3 (l) | 50.29[1] | – | – | – |
| N2O3 (g) | 83.72[1] | 139.46[1] | 312.28[1] | 65.61[1] |
* (l):Liquid, (g):Gas
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 |
|---|---|---|---|---|
| N2O5 (cr) | -43.1[1] | 113.9[1] | 178.2[1] | 143.1[1] |
| N2O5 (g) | 11.3[1] | 115.1[1] | 355.7[1] | 84.5[1] |
| (g) | 0[1] | 0[1] | 191.61[1] | 29.125[1] |
* (cr):Crystalline solid, (g):Gas
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°, 50.29 kJ · mol−1
- ^ ΔfH°, 83.72 kJ · mol−1
- ^ ΔfG°, 139.46 kJ · mol−1
- ^ S°, 312.28 J · K−1 · mol−1
- ^ Cp°, 65.61 J · K−1 · mol−1
- ^ ΔfH°, -43.1 kJ · mol−1
- ^ ΔfG°, 113.9 kJ · mol−1
- ^ S°, 178.2 J · K−1 · mol−1
- ^ Cp°, 143.1 J · K−1 · mol−1
- ^ ΔfH°, 11.3 kJ · mol−1
- ^ ΔfG°, 115.1 kJ · mol−1
- ^ S°, 355.7 J · K−1 · mol−1
- ^ Cp°, 84.5 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 191.61 J · K−1 · mol−1
- ^ Cp°, 29.125 J · K−1 · mol−1