3CdCO3 🔥→ 3CdO + 3CO↑ + O3↑
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- Decomposition of cadmium carbonate
Decomposition of cadmium carbonate yields cadmium oxide, carbon monoxide, 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 cadmium 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 cadmium carbonate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CdCO3 | Cadmium carbonate | 3 | Self redox agent | Thermally decomposable Oxoacid salt |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CdO | Cadmium oxide | 3 | – | – |
| CO | Carbon monoxide | 3 | Reduced | – |
| 1 | Oxidized | – |
Thermodynamic changes
Changes in standard condition
- Decomposition of cadmium carbonate◆
ΔrG 1074.7 kJ/mol K 0.53 × 10−188 pK 188.28
| 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 | 1288.3 | 1074.7 | 718.9 | – |
per 1 mol of | 429.43 | 358.23 | 239.6 | – |
per 1 mol of | 429.43 | 358.23 | 239.6 | – |
per 1 mol of | 429.43 | 358.23 | 239.6 | – |
| 1288.3 | 1074.7 | 718.9 | – |
Changes in aqueous solution (1)
- Decomposition of cadmium carbonate◆
ΔrG 1074.7 kJ/mol K 0.53 × 10−188 pK 188.28
| 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 | 1288.3 | 1074.7 | 718.9 | – |
per 1 mol of | 429.43 | 358.23 | 239.6 | – |
per 1 mol of | 429.43 | 358.23 | 239.6 | – |
per 1 mol of | 429.43 | 358.23 | 239.6 | – |
| 1288.3 | 1074.7 | 718.9 | – |
Changes in aqueous solution (2)
- Decomposition of cadmium carbonate◆
ΔrG 1085.6 kJ/mol K 0.65 × 10−190 pK 190.19
| 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 | 1271.5 | 1085.6 | 626 | – |
per 1 mol of | 423.83 | 361.87 | 209 | – |
per 1 mol of | 423.83 | 361.87 | 209 | – |
per 1 mol of | 423.83 | 361.87 | 209 | – |
| 1271.5 | 1085.6 | 626 | – |
Changes in aqueous solution (3)
- Decomposition of cadmium carbonate◆
ΔrG 1126.5 kJ/mol K 0.44 × 10−197 pK 197.35
| 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 | 1257.0 | 1126.5 | 439.6 | – |
per 1 mol of | 419.00 | 375.50 | 146.5 | – |
per 1 mol of | 419.00 | 375.50 | 146.5 | – |
per 1 mol of | 419.00 | 375.50 | 146.5 | – |
| 1257.0 | 1126.5 | 439.6 | – |
Changes in aqueous solution (4)
- Decomposition of cadmium carbonate◆
ΔrG 1137.4 kJ/mol K 0.54 × 10−199 pK 199.26
| 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 | 1240.2 | 1137.4 | 347 | – |
per 1 mol of | 413.40 | 379.13 | 116 | – |
per 1 mol of | 413.40 | 379.13 | 116 | – |
per 1 mol of | 413.40 | 379.13 | 116 | – |
| 1240.2 | 1137.4 | 347 | – |
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 |
|---|---|---|---|---|
| CdCO3 (cr) | -750.6[1] | -669.4[1] | 92.5[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 |
|---|---|---|---|---|
| CdO (cr) | -258.2[1] | -228.4[1] | 54.8[1] | 43.43[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] | – |
| (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°, -750.6 kJ · mol−1
- ^ ΔfG°, -669.4 kJ · mol−1
- ^ S°, 92.5 J · K−1 · mol−1
- ^ ΔfH°, -258.2 kJ · mol−1
- ^ ΔfG°, -228.4 kJ · mol−1
- ^ S°, 54.8 J · K−1 · mol−1
- ^ Cp°, 43.43 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°, 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