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CaH2 + MnO → CaO + Mn + H2

The reaction of calcium hydride and manganese(II) oxide yields calcium oxide, manganese, and hydrogen (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 hardly reducible species
Reducing speciesReducing agent + Hardly reducible speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
CaH2Calcium hydride1
Reducing
Reducing
MnOManganese(II) oxide1
Oxidizing
Hardly reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
CaOCalcium oxide1
MnManganese1
Reduced
H2Hydrogen1
Oxidized

Thermodynamic changes

Changes in standard condition (1)

Reaction of calcium hydride and manganese(II) oxide
ΔrG−93.9 kJ/mol
K2.82 × 1016
pK−16.45
CaH2Crystalline solid + MnOCrystalline solid
CaOCrystalline solid + MnCrystalline solidα + 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
−63.7−93.9101
per 1 mol of
−63.7−93.9101
−63.7−93.9101
per 1 mol of
−63.7−93.9101
per 1 mol of
−63.7−93.9101
per 1 mol of
−63.7−93.9101

Changes in standard condition (2)

Reaction of calcium hydride and manganese(II) oxide
CaH2Crystalline solid + MnOCrystalline solid
CaOCrystalline solid + MnCrystalline solidβ + 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
103
per 1 mol of
103
103
per 1 mol of
103
per 1 mol of
103
per 1 mol of
103

Changes in standard condition (3)

Reaction of calcium hydride and manganese(II) oxide
ΔrG−92.5 kJ/mol
K1.60 × 1016
pK−16.21
CaH2Crystalline solid + MnOCrystalline solid
CaOCrystalline solid + MnCrystalline solidγ + 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
−62.1−92.5101
per 1 mol of
−62.1−92.5101
−62.1−92.5101
per 1 mol of
−62.1−92.5101
per 1 mol of
−62.1−92.5101
per 1 mol of
−62.1−92.5101

Changes in aqueous solution (1)

Reaction of calcium hydride and manganese(II) oxide
ΔrG−93.9 kJ/mol
K2.82 × 1016
pK−16.45
CaH2Crystalline solid + MnOCrystalline solid
CaOCrystalline solid + MnCrystalline solidα + 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
−63.7−93.9101
per 1 mol of
−63.7−93.9101
−63.7−93.9101
per 1 mol of
−63.7−93.9101
per 1 mol of
−63.7−93.9101
per 1 mol of
−63.7−93.9101

Changes in aqueous solution (2)

Reaction of calcium hydride and manganese(II) oxide
ΔrG−76.3 kJ/mol
K2.33 × 1013
pK−13.37
CaH2Crystalline solid + MnOCrystalline solid
CaOCrystalline solid + MnCrystalline solidα + 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
−67.9−76.3547
per 1 mol of
−67.9−76.3547
−67.9−76.3547
per 1 mol of
−67.9−76.3547
per 1 mol of
−67.9−76.3547
per 1 mol of
−67.9−76.3547

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
CaH2 (cr)-186.2[1]-147.2[1]42[1]
MnO (cr)-385.22[1]-362.90[1]59.71[1]45.44[1]
MnO (g)124.22[1]
* (cr):Crystalline solid, (g):Gas

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
CaO (cr)-635.09[1]-604.03[1]39.75[1]42.80[1]
CaO (g)
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]
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