You-iggy

10H2S + Co(NO3)2 → 9S + Co + (NH4)2S + 6H2O

The reaction of hydrogen sulfide and cobalt(II) nitrate yields sulfur, cobalt, 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 sulfide10
Reducing
Reducing
Co(NO3)2Cobalt(II) nitrate1
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
SSulfur9
Oxidized
CoCobalt1
Reduced
(NH4)2SAmmonium sulfide1
Reduced
H2OWater6

Thermodynamic changes

Changes in aqueous solution

Reaction of hydrogen sulfide and cobalt(II) nitrate
ΔrG−940.2 kJ/mol
K5.20 × 10164
pK−164.72
10H2SUn-ionized aqueous solution + Co(NO3)2Ionized aqueous solution
9SCrystalline solidrhombic + CoCrystalline solidα, hexagonal + (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
−1077.0−940.2−442
per 1 mol of
−107.70−94.02−44.2
per 1 mol of
−1077.0−940.2−442
per 1 mol of
−119.67−104.5−49.1
per 1 mol of
−1077.0−940.2−442
per 1 mol of
−1077.0−940.2−442
per 1 mol of
−179.50−156.7−73.7

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(NO3)2 (cr)-420.5[1]
Co(NO3)2 (ai)-472.8[1]-276.9[1]180[1]
Co(NO3)2 (cr)
2 hydrate
-1021.7[1]
Co(NO3)2 (cr)
3 hydrate
-1325.9[1]
Co(NO3)2 (cr)
4 hydrate
-1630.5[1]
Co(NO3)2 (cr)
6 hydrate
-2211.20[1]452[1]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (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]
Co (cr)
α, hexagonal
0[1]0[1]30.04[1]24.81[1]
Co (cr)
β, face centered cubic
0.46[1]0.25[1]30.71[1]
Co (g)424.7[1]380.3[1]179.515[1]23.020[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, (ai):Ionized aqueous solution, (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)