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H2S + CO → S + H2O + C

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Reaction of hydrogen sulfide and carbon monoxide
H2SHydrogen sulfide + COCarbon monoxide
⟶
SSulfur + H2OWater + CCarbon

The reaction of hydrogen sulfide and carbon monoxide yields sulfur, water, and carbon (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

Reaction of hydrogen sulfide and carbon monoxide
H2SHydrogen sulfide + COCarbon monoxide
⟶
SSulfur + H2OWater + CCarbon

General equation

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

Oxidation state of each atom

Reaction of hydrogen sulfide and carbon monoxide

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
H2SHydrogen sulfide1
Reducing
Reducing
COCarbon monoxide1
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
SSulfur1
Oxidized
–
H2OWater1
–
–
CCarbon1
Reduced
–

Thermodynamic changes

Changes in standard condition (1)

Reaction of hydrogen sulfide and carbon monoxide
◆
ΔrG−66.40 kJ/mol
K4.29 × 1011
pK−11.63
H2SGas + COGas
⟶
SCrystalline solidrhombic + H2OLiquid + CCrystalline solidgraphite
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
−154.68−66.40−296.0143.09
per 1 mol of
−154.68−66.40−296.0143.09
per 1 mol of
−154.68−66.40−296.0143.09
per 1 mol of
−154.68−66.40−296.0143.09
per 1 mol of
−154.68−66.40−296.0143.09
per 1 mol of
−154.68−66.40−296.0143.09

Changes in standard condition (2)

Reaction of hydrogen sulfide and carbon monoxide
◆
ΔrG−63.50 kJ/mol
K1.33 × 1011
pK−11.12
H2SGas + COGas
⟶
SCrystalline solidrhombic + H2OLiquid + CCrystalline soliddiamond
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
−152.78−63.50−299.3840.67
per 1 mol of
−152.78−63.50−299.3840.67
per 1 mol of
−152.78−63.50−299.3840.67
per 1 mol of
−152.78−63.50−299.3840.67
per 1 mol of
−152.78−63.50−299.3840.67
per 1 mol of
−152.78−63.50−299.3840.67

Changes in standard condition (3)

Reaction of hydrogen sulfide and carbon monoxide
H2SGas + COGas
⟶
SCrystalline solidmonoclinic + H2OLiquid + CCrystalline solidgraphite
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
−154.35–––
per 1 mol of
−154.35–––
per 1 mol of
−154.35–––
per 1 mol of
−154.35–––
per 1 mol of
−154.35–––
per 1 mol of
−154.35–––

Changes in standard condition (4)

Reaction of hydrogen sulfide and carbon monoxide
H2SGas + COGas
⟶
SCrystalline solidmonoclinic + H2OLiquid + CCrystalline soliddiamond
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
−152.45–––
per 1 mol of
−152.45–––
per 1 mol of
−152.45–––
per 1 mol of
−152.45–––
per 1 mol of
−152.45–––
per 1 mol of
−152.45–––

Changes in aqueous solution

Reaction of hydrogen sulfide and carbon monoxide
◆
ΔrG−89.40 kJ/mol
K4.59 × 1015
pK−15.66
H2SUn-ionized aqueous solution + COUn-ionized aqueous solution
⟶
SCrystalline solidrhombic + H2OLiquid + CCrystalline solidgraphite
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
−125.2−89.40−118–
per 1 mol of
−125.2−89.40−118–
per 1 mol of
−125.2−89.40−118–
per 1 mol of
−125.2−89.40−118–
per 1 mol of
−125.2−89.40−118–
per 1 mol of
−125.2−89.40−118–

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]–
CO (g)-110.525[1]-137.168[1]197.674[1]29.142[1]
CO (ao)-120.96[1]-119.90[1]104.6[1]–
* (g):Gas, (ao):Un-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]
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]
C (cr)
graphite
0[1]0[1]5.740[1]8.527[1]
C (cr)
diamond
1.895[1]2.900[1]2.377[1]6.113[1]
C (g)716.682[1]671.257[1]158.096[1]20.838[1]
* (cr):Crystalline solid, (g):Gas, (l):Liquid

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)