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3H2S + 6CuO → Cu2SO3 + 2Cu2S + 3H2O

The reaction of hydrogen sulfide and copper(II) oxide yields copper(I) sulfite, copper(I) sulfide, and water (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

General equation

Reaction of reducing species and reducible species
Reducing speciesReducing agent + Reducible speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
H2SHydrogen sulfide3
Reducing
Reducing
CuOCopper(II) oxide6
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
Cu2SO3Copper(I) sulfite1
Redoxed product
Cu2SCopper(I) sulfide2
Reduced
H2OWater3

Thermodynamic changes

Changes in aqueous solution

Reaction of hydrogen sulfide and copper(II) oxide
ΔrG−408.7 kJ/mol
K3.99 × 1071
pK−71.60
3H2SUn-ionized aqueous solution + 6CuOCrystalline solid
Cu2SO3Ionized aqueous solution + 2Cu2SCrystalline solidα + 3H2OLiquid
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
−445.6−408.7−117
per 1 mol of
−148.5−136.2−39.0
per 1 mol of
−74.27−68.12−19.5
per 1 mol of
−445.6−408.7−117
per 1 mol of
−222.8−204.3−58.5
per 1 mol of
−148.5−136.2−39.0

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
H2S (g)-20.63[1]-33.56[1]205.79[1]34.23[1]
H2S (ao)-39.7[1]-27.83[1]121[1]
CuO (cr)-157.3[1]-129.7[1]42.63[1]42.30[1]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid

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
Cu2SO3 (ai)-492.0[1]-386.6[1]50[1]
Cu2S (cr)
α
-79.5[1]-86.2[1]120.9[1]76.32[1]
H2O (cr)
H2O (l)-285.830[1]-237.129[1]69.91[1]75.291[1]
H2O (g)-241.818[1]-228.572[1]188.825[1]33.577[1]
* (ai):Ionized aqueous solution, (cr):Crystalline solid, (l):Liquid, (g):Gas

References

List of references

  1. 1