3MgCO3 🔥⚡→ 3MgO + 3C + 2O3↑
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- Molten salt electrolysis of magnesium carbonate
Molten salt electrolysis of magnesium carbonate yields magnesium 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
- Molten salt electrolysis of magnesium carbonate
General equation
- Molten salt electrolysis
- SaltSelf redox agent🔥⚡⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Molten salt electrolysis of magnesium carbonate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| MgCO3 | Magnesium carbonate | 3 | Self redox agent | Salt |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| MgO | Magnesium oxide | 3 | – | – |
| 3 | Reduced | – | ||
| 2 | Oxidized | – |
Thermodynamic changes
Changes in standard condition (1)
- Molten salt electrolysis of magnesium carbonate◆
ΔrG 1664.9 kJ/mol K 0.21 × 10−291 pK 291.68
| 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 | 1778.9 | 1664.9 | 381.7 | −9.60 |
per 1 mol of | 592.97 | 554.97 | 127.2 | −3.20 |
per 1 mol of | 592.97 | 554.97 | 127.2 | −3.20 |
| 592.97 | 554.97 | 127.2 | −3.20 | |
| 889.45 | 832.45 | 190.8 | −4.80 |
Changes in standard condition (2)
- Molten salt electrolysis of magnesium carbonate◆
ΔrG 1673.6 kJ/mol K 0.63 × 10−293 pK 293.20
| 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 | 1784.5 | 1673.6 | 371.6 | −16.84 |
per 1 mol of | 594.83 | 557.87 | 123.9 | −5.613 |
per 1 mol of | 594.83 | 557.87 | 123.9 | −5.613 |
| 594.83 | 557.87 | 123.9 | −5.613 | |
| 892.25 | 836.80 | 185.8 | −8.420 |
Changes in aqueous solution (1)
- Molten salt electrolysis of magnesium carbonate◆
ΔrG 1664.9 kJ/mol K 0.21 × 10−291 pK 291.68
| 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 | 1778.9 | 1664.9 | 381.7 | −9.60 |
per 1 mol of | 592.97 | 554.97 | 127.2 | −3.20 |
per 1 mol of | 592.97 | 554.97 | 127.2 | −3.20 |
| 592.97 | 554.97 | 127.2 | −3.20 | |
| 889.45 | 832.45 | 190.8 | −4.80 |
Changes in aqueous solution (2)
- Molten salt electrolysis of magnesium carbonate◆
ΔrG 1686.7 kJ/mol K 0.32 × 10−295 pK 295.50
| 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 | 1745.3 | 1686.7 | 196 | – |
per 1 mol of | 581.77 | 562.23 | 65.3 | – |
per 1 mol of | 581.77 | 562.23 | 65.3 | – |
| 581.77 | 562.23 | 65.3 | – | |
| 872.65 | 843.35 | 98.0 | – |
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 |
|---|---|---|---|---|
| MgCO3 (cr) | -1095.8[1] | -1012.1[1] | 65.7[1] | 75.52[1] |
| MgCO3 (cr) 3 hydrate | – | -1726.1[1] | – | – |
| MgCO3 (cr) 5 hydrate | – | -2199.2[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 |
|---|---|---|---|---|
| MgO (cr) | -597.98[1] | -565.95[1] | 27.91[1] | 37.66[1] |
| MgO (g) | 17[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) | 142.7[1] | 163.2[1] | 238.93[1] | 39.20[1] |
| (ao) | 125.9[1] | 174.1[1] | 146[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°, -1095.8 kJ · mol−1
- ^ ΔfG°, -1012.1 kJ · mol−1
- ^ S°, 65.7 J · K−1 · mol−1
- ^ Cp°, 75.52 J · K−1 · mol−1
- ^ ΔfG°, -1726.1 kJ · mol−1
- ^ ΔfG°, -2199.2 kJ · mol−1
- ^ ΔfH°, -597.98 kJ · mol−1
- ^ ΔfG°, -565.95 kJ · mol−1
- ^ S°, 27.91 J · K−1 · mol−1
- ^ Cp°, 37.66 J · K−1 · mol−1
- ^ ΔfH°, 17. kJ · 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°, 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