2CdSO4 🔥→ 2Cd + O2↑ + 2SO3
Last updated:
- Decomposition of cadmium sulfate
Decomposition of cadmium sulfate yields , , and sulfur trioxide (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 sulfate
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 sulfate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CdSO4 | Cadmium sulfate | 2 | Self redox agent | Thermally decomposable Oxoacid salt |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| 2 | Reduced | – | ||
| 1 | Oxidized | – | ||
| SO3 | Sulfur trioxide | 2 | – | – |
Thermodynamic changes
Changes in standard condition (1)
- Decomposition of cadmium sulfate◆
ΔrG 897.94 kJ/mol K 0.49 × 10−157 pK 157.31
| 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 | 984.48 | 897.94 | 290.2 | – |
per 1 mol of | 492.24 | 448.97 | 145.1 | – |
| 492.24 | 448.97 | 145.1 | – | |
| 984.48 | 897.94 | 290.2 | – | |
per 1 mol of | 492.24 | 448.97 | 145.1 | – |
Changes in standard condition (2)
- Decomposition of cadmium sulfate◆
ΔrG 896.76 kJ/mol K 0.78 × 10−157 pK 157.11
| 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 | 983.30 | 896.76 | 290.2 | – |
per 1 mol of | 491.65 | 448.38 | 145.1 | – |
| 491.65 | 448.38 | 145.1 | – | |
| 983.30 | 896.76 | 290.2 | – | |
per 1 mol of | 491.65 | 448.38 | 145.1 | – |
Changes in aqueous solution (1)
- Decomposition of cadmium sulfate◆
ΔrG 897.02 kJ/mol K 0.71 × 10−157 pK 157.15
| 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 | 957.54 | 897.02 | 204.0 | – |
per 1 mol of | 478.77 | 448.51 | 102.0 | – |
| 478.77 | 448.51 | 102.0 | – | |
| 957.54 | 897.02 | 204.0 | – | |
per 1 mol of | 478.77 | 448.51 | 102.0 | – |
Changes in aqueous solution (2)
- Decomposition of cadmium sulfate◆
ΔrG 913.4 kJ/mol K 0.95 × 10−160 pK 160.02
| 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 | 945.8 | 913.4 | 109.7 | – |
per 1 mol of | 472.9 | 456.7 | 54.85 | – |
| 472.9 | 456.7 | 54.85 | – | |
| 945.8 | 913.4 | 109.7 | – | |
per 1 mol of | 472.9 | 456.7 | 54.85 | – |
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 |
|---|---|---|---|---|
| CdSO4 (cr) | -933.28[1] | -822.72[1] | 123.039[1] | 99.58[1] |
| CdSO4 (ai) | -985.16[1] | -822.13[1] | -53.1[1] | – |
| CdSO4 (cr) 1 hydrate | -1239.55[1] | -1068.73[1] | 154.030[1] | 134.56[1] |
| CdSO4 (cr) 8/3 hydrate | -1729.4[1] | -1465.141[1] | 229.630[1] | 213.26[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 |
|---|---|---|---|---|
| (cr) γ | 0[1] | 0[1] | 51.76[1] | 25.98[1] |
| (cr) α | -0.59[1] | -0.59[1] | 51.76[1] | – |
| (g) | 112.01[1] | 77.41[1] | 167.746[1] | 20.786[1] |
| (g) | 0[1] | 0[1] | 205.138[1] | 29.355[1] |
| (ao) | -11.7[1] | 16.4[1] | 110.9[1] | – |
| SO3 (cr) β | -454.51[1] | -374.21[1] | 70.7[1] | – |
| SO3 (l) | -441.04[1] | -373.75[1] | 113.8[1] | – |
| SO3 (g) | -395.72[1] | -371.06[1] | 256.76[1] | 50.67[1] |
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution, (l):Liquid
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°, -933.28 kJ · mol−1
- ^ ΔfG°, -822.72 kJ · mol−1
- ^ S°, 123.039 J · K−1 · mol−1
- ^ Cp°, 99.58 J · K−1 · mol−1
- ^ ΔfH°, -985.16 kJ · mol−1
- ^ ΔfG°, -822.13 kJ · mol−1
- ^ S°, -53.1 J · K−1 · mol−1
- ^ ΔfH°, -1239.55 kJ · mol−1
- ^ ΔfG°, -1068.73 kJ · mol−1
- ^ S°, 154.030 J · K−1 · mol−1
- ^ Cp°, 134.56 J · K−1 · mol−1
- ^ ΔfH°, -1729.4 kJ · mol−1
- ^ ΔfG°, -1465.141 kJ · mol−1
- ^ S°, 229.630 J · K−1 · mol−1
- ^ Cp°, 213.26 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 51.76 J · K−1 · mol−1
- ^ Cp°, 25.98 J · K−1 · mol−1
- ^ ΔfH°, -0.59 kJ · mol−1
- ^ ΔfG°, -0.59 kJ · mol−1
- ^ S°, 51.76 J · K−1 · mol−1
- ^ ΔfH°, 112.01 kJ · mol−1
- ^ ΔfG°, 77.41 kJ · mol−1
- ^ S°, 167.746 J · K−1 · mol−1
- ^ Cp°, 20.786 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°, -454.51 kJ · mol−1
- ^ ΔfG°, -374.21 kJ · mol−1
- ^ S°, 70.7 J · K−1 · mol−1
- ^ ΔfH°, -441.04 kJ · mol−1
- ^ ΔfG°, -373.75 kJ · mol−1
- ^ S°, 113.8 J · K−1 · mol−1
- ^ ΔfH°, -395.72 kJ · mol−1
- ^ ΔfG°, -371.06 kJ · mol−1
- ^ S°, 256.76 J · K−1 · mol−1
- ^ Cp°, 50.67 J · K−1 · mol−1