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10H2S + 3P4O10 🔥→ 10H2SO3 + 12P

The reaction of hydrogen sulfide and tetraphosphorus decaoxide yields sulfurous acid and phosphorus (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 sulfide10
Reducing
Reducing
P4O10Tetraphosphorus decaoxide3
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
H2SO3Sulfurous acid10
Oxidized
PPhosphorus12
Reduced

Thermodynamic changes

Changes in standard condition

Reaction of hydrogen sulfide and tetraphosphorus decaoxide
ΔrG2993.3 kJ/mol
K0.39 × 10−524
pK524.40
10H2SUn-ionized aqueous solution + 3P4O10Crystalline solidhexagonal
🔥
10H2SO3Un-ionized aqueous solution + 12PCrystalline solidwhite
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
3260.92993.3919
per 1 mol of
326.09299.3391.9
1087.0997.77306
per 1 mol of
326.09299.3391.9
per 1 mol of
271.74249.4476.6

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]
P4O10 (cr)
hexagonal
-2984.0[1]-2697.7[1]228.86[1]211.71[1]
P4O10 (am)-3042[1]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (am):Amorphous 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
H2SO3 (ao)-608.81[1]-537.81[1]232.2[1]
P (cr)
white
0[1]0[1]41.09[1]23.84[1]
P (cr)
red, triclinic
-17.6[1]-12.1[1]22.80[1]21.21[1]
P (cr)
black
-39.3[1]
P (am)
red
-7.5[1]
P (g)314.64[1]278.25[1]163.193[1]20.786[1]
* (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (am):Amorphous solid, (g):Gas

References

List of references

  1. 1