2MnCO3 🔥→ Mn2O3 + CO↑ + CO2↑
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- Decomposition of manganese(II) carbonate
Decomposition of manganese(II) carbonate yields manganese(III) oxide, carbon monoxide, and carbon dioxide (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) carbonate
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) carbonate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| MnCO3 | Manganese(II) carbonate | 2 | Self redox agent | Thermally decomposable Oxoacid salt |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Mn2O3 | Manganese(III) oxide | 1 | Oxidized | – |
| CO | Carbon monoxide | 1 | Reduced | – |
| CO2 | Carbon dioxide | 1 | – | – |
Thermodynamic changes
Changes in standard condition (1)
- Decomposition of manganese(II) carbonate◆
ΔrG 220.8 kJ/mol K 0.21 × 10−38 pK 38.68
| 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 | 325.2 | 220.8 | 350.3 | 10.90 |
per 1 mol of | 162.6 | 110.4 | 175.2 | 5.450 |
per 1 mol of | 325.2 | 220.8 | 350.3 | 10.90 |
per 1 mol of | 325.2 | 220.8 | 350.3 | 10.90 |
per 1 mol of | 325.2 | 220.8 | 350.3 | 10.90 |
Changes in standard condition (2)
- Decomposition of manganese(II) carbonate
| 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 | 303.4 | – | – | – |
per 1 mol of | 151.7 | – | – | – |
per 1 mol of | 303.4 | – | – | – |
per 1 mol of | 303.4 | – | – | – |
per 1 mol of | 303.4 | – | – | – |
Changes in aqueous solution (1)
- Decomposition of manganese(II) carbonate◆
ΔrG 220.8 kJ/mol K 0.21 × 10−38 pK 38.68
| 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 | 325.2 | 220.8 | 350.3 | 10.90 |
per 1 mol of | 162.6 | 110.4 | 175.2 | 5.450 |
per 1 mol of | 325.2 | 220.8 | 350.3 | 10.90 |
per 1 mol of | 325.2 | 220.8 | 350.3 | 10.90 |
per 1 mol of | 325.2 | 220.8 | 350.3 | 10.90 |
Changes in aqueous solution (2)
- Decomposition of manganese(II) carbonate◆
ΔrG 229.2 kJ/mol K 0.70 × 10−40 pK 40.15
| 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 | 304.9 | 229.2 | 254.2 | – |
per 1 mol of | 152.4 | 114.6 | 127.1 | – |
per 1 mol of | 304.9 | 229.2 | 254.2 | – |
per 1 mol of | 304.9 | 229.2 | 254.2 | – |
per 1 mol of | 304.9 | 229.2 | 254.2 | – |
Changes in aqueous solution (3)
- Decomposition of manganese(II) carbonate◆
ΔrG 238.0 kJ/mol K 0.20 × 10−41 pK 41.70
| 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 | 314.7 | 238.0 | 257.2 | – |
per 1 mol of | 157.3 | 119.0 | 128.6 | – |
per 1 mol of | 314.7 | 238.0 | 257.2 | – |
per 1 mol of | 314.7 | 238.0 | 257.2 | – |
per 1 mol of | 314.7 | 238.0 | 257.2 | – |
Changes in aqueous solution (4)
- Decomposition of manganese(II) carbonate◆
ΔrG 246.4 kJ/mol K 0.68 × 10−43 pK 43.17
| 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 | 294.4 | 246.4 | 161.1 | – |
per 1 mol of | 147.2 | 123.2 | 80.55 | – |
per 1 mol of | 294.4 | 246.4 | 161.1 | – |
per 1 mol of | 294.4 | 246.4 | 161.1 | – |
per 1 mol of | 294.4 | 246.4 | 161.1 | – |
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 |
|---|---|---|---|---|
| MnCO3 (cr) natural | -894.1[1] | -816.7[1] | 85.8[1] | 81.50[1] |
| MnCO3 (cr) precipitated | -883.2[1] | – | – | – |
* (cr):Crystalline solid
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] |
| CO (g) | -110.525[1] | -137.168[1] | 197.674[1] | 29.142[1] |
| CO (ao) | -120.96[1] | -119.90[1] | 104.6[1] | – |
| CO2 (g) | -393.509[1] | -394.359[1] | 213.74[1] | 37.11[1] |
| CO2 (ao) | -413.80[1] | -385.98[1] | 117.6[1] | – |
* (cr):Crystalline 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°, -894.1 kJ · mol−1
- ^ ΔfG°, -816.7 kJ · mol−1
- ^ S°, 85.8 J · K−1 · mol−1
- ^ Cp°, 81.50 J · K−1 · mol−1
- ^ ΔfH°, -883.2 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°, -110.525 kJ · mol−1
- ^ ΔfG°, -137.168 kJ · mol−1
- ^ S°, 197.674 J · K−1 · mol−1
- ^ Cp°, 29.142 J · K−1 · mol−1
- ^ ΔfH°, -120.96 kJ · mol−1
- ^ ΔfG°, -119.90 kJ · mol−1
- ^ S°, 104.6 J · K−1 · mol−1
- ^ ΔfH°, -393.509 kJ · mol−1
- ^ ΔfG°, -394.359 kJ · mol−1
- ^ S°, 213.74 J · K−1 · mol−1
- ^ Cp°, 37.11 J · K−1 · mol−1
- ^ ΔfH°, -413.80 kJ · mol−1
- ^ ΔfG°, -385.98 kJ · mol−1
- ^ S°, 117.6 J · K−1 · mol−1