CaCO3 🔥→ CaO + O2↑ + C
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- Decomposition of calcium carbonate
Decomposition of calcium carbonate yields calcium 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 calcium 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 calcium carbonate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaCO3 | Calcium carbonate | 1 | Self redox agent | Thermally decomposable Oxoacid salt |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaO | Calcium oxide | 1 | – | – |
| 1 | Oxidized | – | ||
| 1 | Reduced | – |
Thermodynamic changes
Changes in standard condition (1)
- Decomposition of calcium carbonate◆
ΔrG 523.72 kJ/mol K 0.18 × 10−91 pK 91.75
| 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 | 572.04 | 523.72 | 161.9 | −0.57 |
per 1 mol of | 572.04 | 523.72 | 161.9 | −0.570 |
per 1 mol of | 572.04 | 523.72 | 161.9 | −0.570 |
| 572.04 | 523.72 | 161.9 | −0.570 | |
| 572.04 | 523.72 | 161.9 | −0.570 |
Changes in standard condition (2)
- Decomposition of calcium carbonate◆
ΔrG 526.62 kJ/mol K 0.55 × 10−92 pK 92.26
| 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 | 573.94 | 526.62 | 158.6 | −2.98 |
per 1 mol of | 573.94 | 526.62 | 158.6 | −2.98 |
per 1 mol of | 573.94 | 526.62 | 158.6 | −2.98 |
| 573.94 | 526.62 | 158.6 | −2.98 | |
| 573.94 | 526.62 | 158.6 | −2.98 |
Changes in aqueous solution (1)
- Decomposition of calcium carbonate◆
ΔrG 523.72 kJ/mol K 0.18 × 10−91 pK 91.75
| 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 | 572.04 | 523.72 | 161.9 | −0.57 |
per 1 mol of | 572.04 | 523.72 | 161.9 | −0.570 |
per 1 mol of | 572.04 | 523.72 | 161.9 | −0.570 |
| 572.04 | 523.72 | 161.9 | −0.570 | |
| 572.04 | 523.72 | 161.9 | −0.570 |
Changes in aqueous solution (2)
- Decomposition of calcium carbonate◆
ΔrG 540.1 kJ/mol K 0.24 × 10−94 pK 94.62
| 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 | 560.3 | 540.1 | 67.7 | – |
per 1 mol of | 560.3 | 540.1 | 67.7 | – |
per 1 mol of | 560.3 | 540.1 | 67.7 | – |
| 560.3 | 540.1 | 67.7 | – | |
| 560.3 | 540.1 | 67.7 | – |
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 |
|---|---|---|---|---|
| CaCO3 (cr) | -1207.13[1] | -1127.75[1] | 88.7[1] | 81.25[1] |
| CaCO3 (ai) | -1219.97[1] | -1081.39[1] | -110.0[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) | – | – | – | – |
| (g) | 0[1] | 0[1] | 205.138[1] | 29.355[1] |
| (ao) | -11.7[1] | 16.4[1] | 110.9[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] |
* (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°, -1207.13 kJ · mol−1
- ^ ΔfG°, -1127.75 kJ · mol−1
- ^ S°, 88.7 J · K−1 · mol−1
- ^ Cp°, 81.25 J · K−1 · mol−1
- ^ ΔfH°, -1219.97 kJ · mol−1
- ^ ΔfG°, -1081.39 kJ · mol−1
- ^ S°, -110.0 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°, 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
- ^ 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