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H2S + SeO2 → SO2 + H2Se

The reaction of hydrogen sulfide and selenium dioxide yields sulfur dioxide and hydrogen selenide (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 sulfide1
Reducing
Reducing
SeO2Selenium dioxide1
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
SO2Sulfur dioxide1
Oxidized
H2SeHydrogen selenide1
Reduced

Thermodynamic changes

Changes in standard condition

Reaction of hydrogen sulfide and selenium dioxide
H2SGas + SeO2Crystalline solid
SO2Gas + H2SeGas
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
−21.2
per 1 mol of
−21.2
per 1 mol of
−21.2
per 1 mol of
−21.2
per 1 mol of
−21.2

Changes in aqueous solution (1)

Reaction of hydrogen sulfide and selenium dioxide
H2SUn-ionized aqueous solution + SeO2Aqueous solution
SO2Gas + H2SeGas
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
−5.8
per 1 mol of
−5.8
per 1 mol of
−5.8
per 1 mol of
−5.8
per 1 mol of
−5.8

Changes in aqueous solution (2)

Reaction of hydrogen sulfide and selenium dioxide
H2SUn-ionized aqueous solution + SeO2Aqueous solution
SO2Gas + H2SeUn-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
−16.3
per 1 mol of
−16.3
per 1 mol of
−16.3
per 1 mol of
−16.3
per 1 mol of
−16.3

Changes in aqueous solution (3)

Reaction of hydrogen sulfide and selenium dioxide
H2SUn-ionized aqueous solution + SeO2Aqueous solution
SO2Un-ionized aqueous solution + H2SeGas
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
−32.0
per 1 mol of
−32.0
per 1 mol of
−32.0
per 1 mol of
−32.0
per 1 mol of
−32.0

Changes in aqueous solution (4)

Reaction of hydrogen sulfide and selenium dioxide
H2SUn-ionized aqueous solution + SeO2Aqueous solution
SO2Un-ionized aqueous solution + H2SeUn-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
−42.5
per 1 mol of
−42.5
per 1 mol of
−42.5
per 1 mol of
−42.5
per 1 mol of
−42.5

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]
SeO2 (cr)-225.35[1]
SeO2 (aq)-221.63[1]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (aq):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
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]
H2Se (g)29.7[1]15.9[1]219.02[1]34.73[1]
H2Se (ao)19.2[1]22.2[1]163.6[1]
* (l):Liquid, (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1