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6H2S + 2NH4ClO3 → 5S + Cl2 + (NH4)2S + 6H2O

The reaction of hydrogen sulfide and ammonium chlorate yields sulfur, chlorine, ammonium 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 oxidizing species
Reducing speciesReducing agent + Oxidizing speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
H2SHydrogen sulfide6
Reducing
Reducing
NH4ClO3Ammonium chlorate2
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
SSulfur5
Oxidized
Cl2Chlorine1
Reduced
(NH4)2SAmmonium sulfide1
H2OWater6

Thermodynamic changes

Changes in aqueous solution (1)

Reaction of hydrogen sulfide and ammonium chlorate
ΔrG−1153.9 kJ/mol
K1.43 × 10202
pK−202.15
6H2SUn-ionized aqueous solution + 2NH4ClO3Ionized aqueous solution
5SCrystalline solidrhombic + Cl2Gas + (NH4)2SIonized aqueous solution + 6H2OLiquid
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
−1235.6−1153.9−264
per 1 mol of
−205.93−192.32−44.0
per 1 mol of
−617.80−576.95−132
per 1 mol of
−247.12−230.78−52.8
per 1 mol of
−1235.6−1153.9−264
per 1 mol of
−1235.6−1153.9−264
per 1 mol of
−205.93−192.32−44.0

Changes in aqueous solution (2)

Reaction of hydrogen sulfide and ammonium chlorate
ΔrG−1146.9 kJ/mol
K8.48 × 10200
pK−200.93
6H2SUn-ionized aqueous solution + 2NH4ClO3Ionized aqueous solution
5SCrystalline solidrhombic + Cl2Un-ionized aqueous solution + (NH4)2SIonized aqueous solution + 6H2OLiquid
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
−1259.0−1146.9−366
per 1 mol of
−209.83−191.15−61.0
per 1 mol of
−629.50−573.45−183
per 1 mol of
−251.80−229.38−73.2
per 1 mol of
−1259.0−1146.9−366
per 1 mol of
−1259.0−1146.9−366
per 1 mol of
−209.83−191.15−61.0

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]
NH4ClO3 (ai)-236.48[1]-87.26[1]275.7[1]
* (g):Gas, (ao):Un-ionized aqueous solution, (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
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]
Cl2 (g)0[1]0[1]223.066[1]33.907[1]
Cl2 (ao)-23.4[1]6.94[1]121[1]
(NH4)2S (ai)-231.8[1]-72.6[1]212.1[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, (ao):Un-ionized aqueous solution, (ai):Ionized aqueous solution, (l):Liquid

References

List of references

  1. 1