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8H2S + Zn3(PO4)2 → 8S + Zn3P2 + 8H2O

The reaction of hydrogen sulfide and zinc phosphate yields sulfur, zinc phosphide, 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 sulfide8
Reducing
Reducing
Zn3(PO4)2Zinc phosphate1
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
SSulfur8
Oxidized
Zn3P2Zinc phosphide1
Reduced
H2OWater8

Thermodynamic changes

Changes in standard condition (1)

Reaction of hydrogen sulfide and zinc phosphate
8H2SGas + Zn3(PO4)2Crystalline solid
8SCrystalline solidrhombic + Zn3P2Crystalline solid + 8H2OLiquid
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
298
per 1 mol of
37.3
per 1 mol of
298
per 1 mol of
37.3
per 1 mol of
298
per 1 mol of
37.3

Changes in standard condition (2)

Reaction of hydrogen sulfide and zinc phosphate
8H2SGas + Zn3(PO4)2Crystalline solid
8SCrystalline solidmonoclinic + Zn3P2Crystalline solid + 8H2OLiquid
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
300
per 1 mol of
37.5
per 1 mol of
300
per 1 mol of
37.5
per 1 mol of
300
per 1 mol of
37.5

Changes in aqueous solution

Reaction of hydrogen sulfide and zinc phosphate
8H2SUn-ionized aqueous solution + Zn3(PO4)2Crystalline solid
8SCrystalline solidrhombic + Zn3P2Crystalline solid + 8H2OLiquid
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
450
per 1 mol of
56.3
per 1 mol of
450
per 1 mol of
56.3
per 1 mol of
450
per 1 mol of
56.3

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]
Zn3(PO4)2 (cr)-2892.4[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
S (cr)
rhombic
0[1]0[1]31.80[1]22.64[1]
S (cr)
monoclinic
0.33[1]
S (g)278.805[1]238.250[1]167.821[1]23.673[1]
Zn3P2 (cr)-473[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]
* (cr):Crystalline solid, (g):Gas, (l):Liquid

References

List of references

  1. 1