2Ca(NO3)2 🔥⚡→ 2CaO + 4NO2↑ + O2↑
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- Molten salt electrolysis of calcium nitrate
Molten salt electrolysis of calcium nitrate yields calcium oxide, nitrogen dioxide, 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 calcium nitrate
General equation
- Molten salt electrolysis
- SaltSelf redox agent🔥⚡⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Molten salt electrolysis of calcium nitrate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ca(NO3)2 | Calcium nitrate | 2 | Self redox agent | Salt |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaO | Calcium oxide | 2 | – | – |
| NO2 | Nitrogen dioxide | 4 | Reduced | – |
| 1 | Oxidized | – |
Thermodynamic changes
Changes in standard condition
- Molten salt electrolysis of calcium nitrate◆
ΔrG 483.32 kJ/mol K 0.21 × 10−84 pK 84.67
| 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 | 739.32 | 483.32 | 858.3 | −34.99 |
per 1 mol of | 369.66 | 241.66 | 429.1 | −17.50 |
per 1 mol of | 369.66 | 241.66 | 429.1 | −17.50 |
per 1 mol of | 184.83 | 120.83 | 214.6 | −8.748 |
| 739.32 | 483.32 | 858.3 | −34.99 |
Changes in aqueous solution (1)
- Molten salt electrolysis of calcium nitrate◆
ΔrG 549.36 kJ/mol K 0.57 × 10−96 pK 96.24
| 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 | 777.64 | 549.36 | 765.5 | – |
per 1 mol of | 388.82 | 274.68 | 382.8 | – |
per 1 mol of | 388.82 | 274.68 | 382.8 | – |
per 1 mol of | 194.41 | 137.34 | 191.4 | – |
| 777.64 | 549.36 | 765.5 | – |
Changes in aqueous solution (2)
- Molten salt electrolysis of calcium nitrate◆
ΔrG 565.8 kJ/mol K 0.75 × 10−99 pK 99.12
| 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 | 765.9 | 565.8 | 671.2 | – |
per 1 mol of | 382.9 | 282.9 | 335.6 | – |
per 1 mol of | 382.9 | 282.9 | 335.6 | – |
per 1 mol of | 191.5 | 141.4 | 167.8 | – |
| 765.9 | 565.8 | 671.2 | – |
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 |
|---|---|---|---|---|
| Ca(NO3)2 (cr) | -938.39[1] | -743.07[1] | 193.3[1] | 149.37[1] |
| Ca(NO3)2 (ai) | -957.55[1] | -776.09[1] | 239.7[1] | – |
| Ca(NO3)2 (cr) 2 hydrate | -1540.76[1] | -1229.11[1] | 269.4[1] | – |
| Ca(NO3)2 (cr) 3 hydrate | -1838.0[1] | -1471.7[1] | 319.2[1] | – |
| Ca(NO3)2 (cr) 4 hydrate | -2132.33[1] | -1713.15[1] | 375.3[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 |
|---|---|---|---|---|
| CaO (cr) | -635.09[1] | -604.03[1] | 39.75[1] | 42.80[1] |
| CaO (g) | – | – | – | – |
| NO2 (g) | 33.18[1] | 51.31[1] | 240.06[1] | 37.20[1] |
| (g) | 0[1] | 0[1] | 205.138[1] | 29.355[1] |
| (ao) | -11.7[1] | 16.4[1] | 110.9[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°, -938.39 kJ · mol−1
- ^ ΔfG°, -743.07 kJ · mol−1
- ^ S°, 193.3 J · K−1 · mol−1
- ^ Cp°, 149.37 J · K−1 · mol−1
- ^ ΔfH°, -957.55 kJ · mol−1
- ^ ΔfG°, -776.09 kJ · mol−1
- ^ S°, 239.7 J · K−1 · mol−1
- ^ ΔfH°, -1540.76 kJ · mol−1
- ^ ΔfG°, -1229.11 kJ · mol−1
- ^ S°, 269.4 J · K−1 · mol−1
- ^ ΔfH°, -1838.0 kJ · mol−1
- ^ ΔfG°, -1471.7 kJ · mol−1
- ^ S°, 319.2 J · K−1 · mol−1
- ^ ΔfH°, -2132.33 kJ · mol−1
- ^ ΔfG°, -1713.15 kJ · mol−1
- ^ S°, 375.3 J · K−1 · mol−1
- ^ ΔfH°, -635.09 kJ · mol−1
- ^ ΔfG°, -604.03 kJ · mol−1
- ^ S°, 39.75 J · K−1 · mol−1
- ^ Cp°, 42.80 J · K−1 · mol−1
- ^ ΔfH°, 33.18 kJ · mol−1
- ^ ΔfG°, 51.31 kJ · mol−1
- ^ S°, 240.06 J · K−1 · mol−1
- ^ Cp°, 37.20 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 205.138 J · K−1 · mol−1
- ^ Cp°, 29.355 J · K−1 · mol−1
- ^ ΔfH°, -11.7 kJ · mol−1
- ^ ΔfG°, 16.4 kJ · mol−1
- ^ S°, 110.9 J · K−1 · mol−1