2MnSiO3 🔥→ Mn2O3 + 2Si + O3↑
Last updated:
- Decomposition of manganese(II) metasilicate
Decomposition of manganese(II) metasilicate yields manganese(III) oxide, , 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 manganese(II) metasilicate
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 manganese(II) metasilicate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| MnSiO3 | Manganese(II) metasilicate | 2 | Self redox agent | Thermally decomposable Oxoacid salt |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Mn2O3 | Manganese(III) oxide | 1 | Oxidized | – |
| 2 | Reduced | – | ||
| 1 | Oxidized | – |
Thermodynamic changes
Changes in standard condition (1)
- Decomposition of manganese(II) metasilicate◆
ΔrG 1763.1 kJ/mol K 0.13 × 10−308 pK 308.88
| 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 | 1825.5 | 1763.1 | 208.9 | 13.97 |
per 1 mol of | 912.75 | 881.55 | 104.5 | 6.985 |
per 1 mol of | 1825.5 | 1763.1 | 208.9 | 13.97 |
| 912.75 | 881.55 | 104.5 | 6.985 | |
| 1825.5 | 1763.1 | 208.9 | 13.97 |
Changes in standard condition (2)
- Decomposition of manganese(II) metasilicate
| 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 | 1833.9 | – | – | – |
per 1 mol of | 916.95 | – | – | – |
per 1 mol of | 1833.9 | – | – | – |
| 916.95 | – | – | – | |
| 1833.9 | – | – | – |
Changes in aqueous solution (1)
- Decomposition of manganese(II) metasilicate◆
ΔrG 1763.1 kJ/mol K 0.13 × 10−308 pK 308.88
| 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 | 1825.5 | 1763.1 | 208.9 | 13.97 |
per 1 mol of | 912.75 | 881.55 | 104.5 | 6.985 |
per 1 mol of | 1825.5 | 1763.1 | 208.9 | 13.97 |
| 912.75 | 881.55 | 104.5 | 6.985 | |
| 1825.5 | 1763.1 | 208.9 | 13.97 |
Changes in aqueous solution (2)
- Decomposition of manganese(II) metasilicate◆
ΔrG 1774.0 kJ/mol K 0.16 × 10−310 pK 310.79
| 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 | 1808.7 | 1774.0 | 116 | – |
per 1 mol of | 904.35 | 887.00 | 58.0 | – |
per 1 mol of | 1808.7 | 1774.0 | 116 | – |
| 904.35 | 887.00 | 58.0 | – | |
| 1808.7 | 1774.0 | 116 | – |
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 |
|---|---|---|---|---|
| MnSiO3 (cr) | -1320.9[1] | -1240.5[1] | 89.1[1] | 86.44[1] |
| MnSiO3 (vit) | -1285.3[1] | – | – | – |
* (cr):Crystalline solid, (vit):Vitreous liquid
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 |
|---|---|---|---|---|
| Mn2O3 (cr) | -959.0[1] | -881.1[1] | 110.5[1] | 107.65[1] |
| (cr) | 0[1] | 0[1] | 18.83[1] | 20.00[1] |
| (am) | 4.2[1] | – | – | – |
| (g) | 455.6[1] | 411.3[1] | 167.97[1] | 22.251[1] |
| (g) | 142.7[1] | 163.2[1] | 238.93[1] | 39.20[1] |
| (ao) | 125.9[1] | 174.1[1] | 146[1] | – |
* (cr):Crystalline solid, (am):Amorphous solid, (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°, -1320.9 kJ · mol−1
- ^ ΔfG°, -1240.5 kJ · mol−1
- ^ S°, 89.1 J · K−1 · mol−1
- ^ Cp°, 86.44 J · K−1 · mol−1
- ^ ΔfH°, -1285.3 kJ · mol−1
- ^ ΔfH°, -959.0 kJ · mol−1
- ^ ΔfG°, -881.1 kJ · mol−1
- ^ S°, 110.5 J · K−1 · mol−1
- ^ Cp°, 107.65 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 18.83 J · K−1 · mol−1
- ^ Cp°, 20.00 J · K−1 · mol−1
- ^ ΔfH°, 4.2 kJ · mol−1
- ^ ΔfH°, 455.6 kJ · mol−1
- ^ ΔfG°, 411.3 kJ · mol−1
- ^ S°, 167.97 J · K−1 · mol−1
- ^ Cp°, 22.251 J · K−1 · mol−1
- ^ ΔfH°, 142.7 kJ · mol−1
- ^ ΔfG°, 163.2 kJ · mol−1
- ^ S°, 238.93 J · K−1 · mol−1
- ^ Cp°, 39.20 J · K−1 · mol−1
- ^ ΔfH°, 125.9 kJ · mol−1
- ^ ΔfG°, 174.1 kJ · mol−1
- ^ S°, 146. J · K−1 · mol−1