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Ni + H2S → NiS + H2

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Reaction of nickel and hydrogen sulfide
NiNickel + H2SHydrogen sulfide
⟶
NiSNickel(II) sulfide + H2Hydrogen

The reaction of nickel and hydrogen sulfide yields nickel(II) sulfide and hydrogen. 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 categories

Reaction data

Chemical equation

Reaction of nickel and hydrogen sulfide
NiNickel + H2SHydrogen sulfide
⟶
NiSNickel(II) sulfide + H2Hydrogen

General equation

Reaction of reducing species and reducible species
Reducing speciesReducing agent + Reducible speciesOxidizing agent
⟶
ProductOxidation product + ProductReduction product
Reaction of active metal and acid
Active metalReducing agent + AcidOxidizing agent
⟶
SaltOxidation product + H2Reduction product

Oxidation state of each atom

Reaction of nickel and hydrogen sulfide

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NiNickel1
Reducing
Reducing
Active metal
H2SHydrogen sulfide1
Oxidizing
Reducible
Acid

Products

Chemical formulaNameCoefficientTypeType in general
equation
NiSNickel(II) sulfide1
Oxidized
–
Salt
H2Hydrogen1
Reduced
–
Hydrogen

Thermodynamic changes

Changes in standard condition (1)

Reaction of nickel and hydrogen sulfide
◆
ΔrG−45.9 kJ/mol
K1.10 × 108
pK−8.04
NiCrystalline solid + H2SGas
⟶
NiSCrystalline solid + H2Gas
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
−61.4−45.9−52.0115.63
per 1 mol of
−61.4−45.9−52.0115.63
per 1 mol of
−61.4−45.9−52.0115.63
per 1 mol of
−61.4−45.9−52.0115.63
per 1 mol of
−61.4−45.9−52.0115.63

Changes in standard condition (2)

Reaction of nickel and hydrogen sulfide
NiCrystalline solid + H2SGas
⟶
NiSCrystalline solidprecipitated + H2Gas
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
−56.8–––
per 1 mol of
−56.8–––
per 1 mol of
−56.8–––
per 1 mol of
−56.8–––
per 1 mol of
−56.8–––

Changes in aqueous solution (1)

Reaction of nickel and hydrogen sulfide
◆
ΔrG−51.7 kJ/mol
K1.14 × 109
pK−9.06
NiCrystalline solid + H2SUn-ionized aqueous solution
⟶
NiSCrystalline solid + H2Gas
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
−42.3−51.733–
per 1 mol of
−42.3−51.733–
per 1 mol of
−42.3−51.733–
per 1 mol of
−42.3−51.733–
per 1 mol of
−42.3−51.733–

Changes in aqueous solution (2)

Reaction of nickel and hydrogen sulfide
◆
ΔrG−34.1 kJ/mol
K9.42 × 105
pK−5.97
NiCrystalline solid + H2SUn-ionized aqueous solution
⟶
NiSCrystalline solid + H2Un-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
−46.5−34.1479–
per 1 mol of
−46.5−34.1479–
per 1 mol of
−46.5−34.1479–
per 1 mol of
−46.5−34.1479–
per 1 mol of
−46.5−34.1479–

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
Ni (cr)0[1]0[1]29.87[1]26.07[1]
Ni (g)429.7[1]384.5[1]182.193[1]23.359[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]–
* (cr):Crystalline solid, (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
NiS (cr)-82.0[1]-79.5[1]52.97[1]47.11[1]
NiS (cr)
precipitated
-77.4[1]–––
H2 (g)0[1]0[1]130.684[1]28.824[1]
H2 (ao)-4.2[1]17.6[1]577[1]–
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution

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)