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3CdSO4 🔥→ 3CdO + 3SO2↑ + O3↑

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Decomposition of cadmium sulfate
3CdSO4Cadmium sulfate
🔥
⟶
3CdOCadmium oxide + 3SO2↑Sulfur dioxide + O3↑Ozone

Decomposition of cadmium sulfate yields cadmium oxide, sulfur dioxide, and ozone (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:

Table of contents
  1. 1Reaction data
  2. 2Thermodynamic changes
  3. 3References
  4. 4Related reactions
  5. 5Related categories

Reaction data

Chemical equation

Decomposition of cadmium sulfate
3CdSO4Cadmium sulfate
🔥
⟶
3CdOCadmium oxide + 3SO2↑Sulfur dioxide + O3↑Ozone

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 formulaNameCoefficientTypeType in general
equation
CdSO4Cadmium sulfate3
Self redox agent
Thermally decomposable
Oxoacid salt

Products

Chemical formulaNameCoefficientTypeType in general
equation
CdOCadmium oxide3
–
–
SO2Sulfur dioxide3
Reduced
–
O3Ozone1
Oxidized
–

Thermodynamic changes

Changes in standard condition

Decomposition of cadmium sulfate
◆
ΔrG1045.6 kJ/mol
K0.66 × 10−183
pK183.18
3CdSO4Crystalline solid
🔥
⟶
3CdOCrystalline solid + 3SO2↑Gas + O3↑Gas
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
1277.51045.6778.9−9.64
per 1 mol of
425.83348.53259.6−3.21
per 1 mol of
425.83348.53259.6−3.21
per 1 mol of
425.83348.53259.6−3.21
per 1 mol of
1277.51045.6778.9−9.64

Changes in aqueous solution (1)

Decomposition of cadmium sulfate
◆
ΔrG1045.6 kJ/mol
K0.66 × 10−183
pK183.18
3CdSO4Crystalline solid
🔥
⟶
3CdOCrystalline solid + 3SO2↑Gas + O3↑Gas
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
1277.51045.6778.9−9.64
per 1 mol of
425.83348.53259.6−3.21
per 1 mol of
425.83348.53259.6−3.21
per 1 mol of
425.83348.53259.6−3.21
per 1 mol of
1277.51045.6778.9−9.64

Changes in aqueous solution (2)

Decomposition of cadmium sulfate
◆
ΔrG1056.5 kJ/mol
K0.81 × 10−185
pK185.09
3CdSO4Crystalline solid
🔥
⟶
3CdOCrystalline solid + 3SO2↑Gas + O3↑Un-ionized aqueous solution
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
1260.71056.5686–
per 1 mol of
420.23352.17229–
per 1 mol of
420.23352.17229–
per 1 mol of
420.23352.17229–
per 1 mol of
1260.71056.5686–

Changes in aqueous solution (3)

Decomposition of cadmium sulfate
◆
ΔrG1044.1 kJ/mol
K0.12 × 10−182
pK182.92
3CdSO4Crystalline solid
🔥
⟶
3CdOCrystalline solid + 3SO2↑Un-ionized aqueous solution + O3↑Gas
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
1199.01044.1519.9–
per 1 mol of
399.67348.03173.3–
per 1 mol of
399.67348.03173.3–
per 1 mol of
399.67348.03173.3–
per 1 mol of
1199.01044.1519.9–

Changes in aqueous solution (4)

Decomposition of cadmium sulfate
◆
ΔrG1055.0 kJ/mol
K0.15 × 10−184
pK184.83
3CdSO4Crystalline solid
🔥
⟶
3CdOCrystalline solid + 3SO2↑Un-ionized aqueous solution + O3↑Un-ionized aqueous solution
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
1182.21055.0427–
per 1 mol of
394.07351.67142–
per 1 mol of
394.07351.67142–
per 1 mol of
394.07351.67142–
per 1 mol of
1182.21055.0427–

Thermodynamic data of reactants

Chemical formulaStandard 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 formulaStandard 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]
SO2 (l)-320.5[1]–––
SO2 (g)-296.830[1]-300.194[1]248.22[1]39.87[1]
SO2 (ao)-322.980[1]-300.676[1]161.9[1]–
O3 (g)142.7[1]163.2[1]238.93[1]39.20[1]
O3 (ao)125.9[1]174.1[1]146[1]–
* (cr):Crystalline solid, (l):Liquid, (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)