You-iggy

2H2S + 2Mn(NO3)2 → MnSO4 + 4HNO2 + MnS

The reaction of hydrogen sulfide and manganese(II) nitrate yields manganese(II) sulfate, nitrous acid, and manganese(II) sulfide (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 sulfide2
Reducing
Reducing
Mn(NO3)2Manganese(II) nitrate2
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
MnSO4Manganese(II) sulfate1
Oxidized
HNO2Nitrous acid4
Reduced
MnSManganese(II) sulfide1

Thermodynamic changes

Changes in standard condition (1)

Reaction of hydrogen sulfide and manganese(II) nitrate
ΔrG−449.0 kJ/mol
K4.59 × 1078
pK−78.66
2H2SUn-ionized aqueous solution + 2Mn(NO3)2Ionized aqueous solution
MnSO4Un-ionized aqueous solution + 4HNO2Un-ionized aqueous solution + MnSCrystalline solidgreen
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
−456.5−449.0−21
per 1 mol of
−228.3−224.5−11
−228.3−224.5−11
−456.5−449.0−21
per 1 mol of
−114.1−112.3−5.3
−456.5−449.0−21

Changes in standard condition (2)

Reaction of hydrogen sulfide and manganese(II) nitrate
ΔrG−436.0 kJ/mol
K2.42 × 1076
pK−76.38
2H2SUn-ionized aqueous solution + 2Mn(NO3)2Ionized aqueous solution
MnSO4Ionized aqueous solution + 4HNO2Un-ionized aqueous solution + MnSCrystalline solidgreen
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
−470.7−436.0−111
per 1 mol of
−235.3−218.0−55.5
−235.3−218.0−55.5
−470.7−436.0−111
per 1 mol of
−117.7−109.0−27.8
−470.7−436.0−111

Changes in standard condition (3)

Reaction of hydrogen sulfide and manganese(II) nitrate
ΔrG−449.0 kJ/mol
K4.59 × 1078
pK−78.66
2H2SUn-ionized aqueous solution + 2Mn(NO3)2Ionized aqueous solution
MnSO4Un-ionized aqueous solution + 4HNO2Un-ionized aqueous solution + MnSCrystalline solidgreen
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
−456.5−449.0−21
per 1 mol of
−228.3−224.5−11
−228.3−224.5−11
−456.5−449.0−21
per 1 mol of
−114.1−112.3−5.3
−456.5−449.0−21

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]
Mn(NO3)2 (cr)-576.26[1]
Mn(NO3)2 (ai)-635.5[1]-450.9[1]218[1]-121[1]
Mn(NO3)2 (vit)
6 hydrate
-2371.9[1]
Mn(NO3)2 (l)
6 hydrate
-2331.62[1]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (ai):Ionized aqueous solution, (vit):Vitreous liquid, (l):Liquid

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
MnSO4 (cr)-1065.25[1]-957.36[1]112.1[1]100.50[1]
MnSO4 (ai)-1130.1[1]-972.7[1]-53.6[1]-243[1]
MnSO4 (ao)-1115.9[1]-985.7[1]36.4[1]
MnSO4 (cr)
1 hydrate
α
-1376.5[1]
MnSO4 (cr)
1 hydrate
β
-1348.1[1]
MnSO4 (cr)
4 hydrate
-2258.1[1]
MnSO4 (cr)
5 hydrate
-2553.1[1]326[1]
MnSO4 (cr)
7 hydrate
-3139.3[1]
HNO2 (g)
cis
-77.99[1]-42.94[1]248.76[1]44.77[1]
HNO2 (g)
trans
-80.12[1]-45.24[1]249.22[1]46.07[1]
HNO2 (g)-79.5[1]-46.0[1]254.1[1]45.6[1]
HNO2 (ao)-119.2[1]-50.6[1]135.6[1]
MnS (cr)
green
-214.2[1]-218.4[1]78.2[1]49.96[1]
MnS (am)
precipitated, pink
-213.8[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (g):Gas, (am):Amorphous solid

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)