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Mn + 2H2SO4 → MnSO4 + SO2↑ + 2H2O

The reaction of manganese and sulfuric acid yields manganese(II) sulfate, sulfur dioxide, 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 reducible species
Reducing speciesReducing agent + Reducible speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of manganese and sulfuric acid

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
MnManganese1
Reducing
Reducing
H2SO4Sulfuric acid2
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
MnSO4Manganese(II) sulfate1
Oxidized
SO2Sulfur dioxide1
Reduced
H2OWater2

Thermodynamic changes

Changes in standard condition (1)

Reaction of manganese and sulfuric acid
ΔrG−351.81 kJ/mol
K4.31 × 1061
pK−61.63
MnCrystalline solidα + 2H2SO4Liquid
MnSO4Crystalline solid + SO2Gas + 2H2OLiquid
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
−305.76−351.81154.3−13.19
per 1 mol of
−305.76−351.81154.3−13.19
per 1 mol of
−152.88−175.9177.15−6.595
−305.76−351.81154.3−13.19
per 1 mol of
−305.76−351.81154.3−13.19
per 1 mol of
−152.88−175.9177.15−6.595

Changes in standard condition (2)

Reaction of manganese and sulfuric acid
MnCrystalline solidβ + 2H2SO4Liquid
MnSO4Crystalline solid + SO2Gas + 2H2OLiquid
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
151.9−13.40
per 1 mol of
151.9−13.40
per 1 mol of
75.95−6.700
151.9−13.40
per 1 mol of
151.9−13.40
per 1 mol of
75.95−6.700

Changes in standard condition (3)

Reaction of manganese and sulfuric acid
ΔrG−353.23 kJ/mol
K7.64 × 1061
pK−61.88
MnCrystalline solidγ + 2H2SO4Liquid
MnSO4Crystalline solid + SO2Gas + 2H2OLiquid
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
−307.31−353.23153.9−14.44
per 1 mol of
−307.31−353.23153.9−14.44
per 1 mol of
−153.66−176.6276.95−7.220
−307.31−353.23153.9−14.44
per 1 mol of
−307.31−353.23153.9−14.44
per 1 mol of
−153.66−176.6276.95−7.220

Changes in aqueous solution (1)

Reaction of manganese and sulfuric acid
ΔrG−271.1 kJ/mol
K3.12 × 1047
pK−47.49
MnCrystalline solidα + 2H2SO4Ionized aqueous solution
MnSO4Un-ionized aqueous solution + SO2Gas + 2H2OLiquid
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
−165.9−271.1352.2
per 1 mol of
−165.9−271.1352.2
per 1 mol of
−82.95−135.6176.1
−165.9−271.1352.2
per 1 mol of
−165.9−271.1352.2
per 1 mol of
−82.95−135.6176.1

Changes in aqueous solution (2)

Reaction of manganese and sulfuric acid
ΔrG−271.6 kJ/mol
K3.82 × 1047
pK−47.58
MnCrystalline solidα + 2H2SO4Ionized aqueous solution
MnSO4Un-ionized aqueous solution + SO2Un-ionized aqueous solution + 2H2OLiquid
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
−192.0−271.6265.9
per 1 mol of
−192.0−271.6265.9
per 1 mol of
−96.00−135.8132.9
−192.0−271.6265.9
per 1 mol of
−192.0−271.6265.9
per 1 mol of
−96.00−135.8132.9

Changes in aqueous solution (3)

Reaction of manganese and sulfuric acid
ΔrG−258.1 kJ/mol
K1.65 × 1045
pK−45.22
MnCrystalline solidα + 2H2SO4Ionized aqueous solution
MnSO4Ionized aqueous solution + SO2Gas + 2H2OLiquid
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
−180.1−258.1262.2507
per 1 mol of
−180.1−258.1262.2507
per 1 mol of
−90.05−129.1131.1254
−180.1−258.1262.2507
per 1 mol of
−180.1−258.1262.2507
per 1 mol of
−90.05−129.1131.1254

Changes in aqueous solution (4)

Reaction of manganese and sulfuric acid
ΔrG−258.6 kJ/mol
K2.02 × 1045
pK−45.30
MnCrystalline solidα + 2H2SO4Ionized aqueous solution
MnSO4Ionized aqueous solution + SO2Un-ionized aqueous solution + 2H2OLiquid
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
−206.2−258.6175.9
per 1 mol of
−206.2−258.6175.9
per 1 mol of
−103.1−129.387.95
−206.2−258.6175.9
per 1 mol of
−206.2−258.6175.9
per 1 mol of
−103.1−129.387.95

Changes in aqueous solution (5)

Reaction of manganese and sulfuric acid
ΔrG−271.1 kJ/mol
K3.12 × 1047
pK−47.49
MnCrystalline solidα + 2H2SO4Ionized aqueous solution
MnSO4Un-ionized aqueous solution + SO2Gas + 2H2OLiquid
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
−165.9−271.1352.2
per 1 mol of
−165.9−271.1352.2
per 1 mol of
−82.95−135.6176.1
−165.9−271.1352.2
per 1 mol of
−165.9−271.1352.2
per 1 mol of
−82.95−135.6176.1

Changes in aqueous solution (6)

Reaction of manganese and sulfuric acid
ΔrG−271.6 kJ/mol
K3.82 × 1047
pK−47.58
MnCrystalline solidα + 2H2SO4Ionized aqueous solution
MnSO4Un-ionized aqueous solution + SO2Un-ionized aqueous solution + 2H2OLiquid
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
−192.0−271.6265.9
per 1 mol of
−192.0−271.6265.9
per 1 mol of
−96.00−135.8132.9
−192.0−271.6265.9
per 1 mol of
−192.0−271.6265.9
per 1 mol of
−96.00−135.8132.9

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
Mn (cr)
α
0[1]0[1]32.01[1]26.32[1]
Mn (cr)
β
34.39[1]26.53[1]
Mn (cr)
γ
1.55[1]1.42[1]32.43[1]27.57[1]
Mn (g)280.7[1]238.5[1]173.70[1]20.79[1]
H2SO4 (cr)
H2SO4 (l)-813.989[1]-690.003[1]156.904[1]138.91[1]
H2SO4 (ai)-909.27[1]-744.53[1]20.1[1]-293[1]
H2SO4 (l)
1 hydrate
-1127.621[1]-950.383[1]211.54[1]214.85[1]
H2SO4 (l)
2 hydrate
-1427.100[1]-1199.650[1]276.40[1]260.83[1]
H2SO4 (l)
3 hydrate
-1720.402[1]-1443.980[1]345.39[1]318.95[1]
H2SO4 (l)
4 hydrate
-2011.199[1]-1685.863[1]414.59[1]382.21[1]
H2SO4 (l)
6.5 hydrate
-2733.256[1]-2285.734[1]587.89[1]570.28[1]
* (cr):Crystalline solid, (g):Gas, (l):Liquid, (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
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]
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]
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, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (l):Liquid, (g):Gas

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)