You-iggy
  1. Home
  2. Chemical reactions
  3. 4CaH2 + KMnO4 → 4CaO + K + Mn + 4H2↑

4CaH2 + KMnO4 → 4CaO + K + Mn + 4H2↑

Last updated:
Reaction of calcium hydride and potassium permanganate
4CaH2Calcium hydride + KMnO4Potassium permanganate
⟶
4CaOCalcium oxide + KPotassium + MnManganese + 4H2↑Hydrogen

The reaction of calcium hydride and potassium permanganate yields calcium oxide, potassium, 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

Reaction of calcium hydride and potassium permanganate
4CaH2Calcium hydride + KMnO4Potassium permanganate
⟶
4CaOCalcium oxide + KPotassium + MnManganese + 4H2↑Hydrogen

General equation

Reaction of reducing species and oxidizing species
Reducing speciesReducing agent + Oxidizing speciesOxidizing agent
⟶
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of calcium hydride and potassium permanganate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
CaH2Calcium hydride4
Reducing
Reducing
KMnO4Potassium permanganate1
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
CaOCalcium oxide4
–
–
KPotassium1
Reduced
–
MnManganese1
Reduced
–
H2Hydrogen4
Oxidized
–

Thermodynamic changes

Changes in standard condition (1)

Reaction of calcium hydride and potassium permanganate
◆
ΔrG−1089.7 kJ/mol
K8.08 × 10190
pK−190.91
4CaH2Crystalline solid + KMnO4Crystalline solid
⟶
4CaOCrystalline solid + KCrystalline solid + MnCrystalline solidα + 4H2↑Gas
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
−958.4−1089.7438–
per 1 mol of
−239.6−272.43110–
−958.4−1089.7438–
per 1 mol of
−239.6−272.43110–
per 1 mol of
−958.4−1089.7438–
per 1 mol of
−958.4−1089.7438–
per 1 mol of
−239.6−272.43110–

Changes in standard condition (2)

Reaction of calcium hydride and potassium permanganate
4CaH2Crystalline solid + KMnO4Crystalline solid
⟶
4CaOCrystalline solid + KCrystalline solid + MnCrystalline solidβ + 4H2↑Gas
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
––441–
per 1 mol of
––110–
––441–
per 1 mol of
––110–
per 1 mol of
––441–
per 1 mol of
––441–
per 1 mol of
––110–

Changes in standard condition (3)

Reaction of calcium hydride and potassium permanganate
◆
ΔrG−1088.3 kJ/mol
K4.59 × 10190
pK−190.66
4CaH2Crystalline solid + KMnO4Crystalline solid
⟶
4CaOCrystalline solid + KCrystalline solid + MnCrystalline solidγ + 4H2↑Gas
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
−956.8−1088.3439–
per 1 mol of
−239.2−272.07110–
−956.8−1088.3439–
per 1 mol of
−239.2−272.07110–
per 1 mol of
−956.8−1088.3439–
per 1 mol of
−956.8−1088.3439–
per 1 mol of
−239.2−272.07110–

Changes in aqueous solution (1)

Reaction of calcium hydride and potassium permanganate
◆
ΔrG−1096.8 kJ/mol
K1.42 × 10192
pK−192.15
4CaH2Crystalline solid + KMnO4Ionized aqueous solution
⟶
4CaOCrystalline solid + KCrystalline solid + MnCrystalline solidα + 4H2↑Gas
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
−1001.8−1096.8316–
per 1 mol of
−250.45−274.2079.0–
−1001.8−1096.8316–
per 1 mol of
−250.45−274.2079.0–
per 1 mol of
−1001.8−1096.8316–
per 1 mol of
−1001.8−1096.8316–
per 1 mol of
−250.45−274.2079.0–

Changes in aqueous solution (2)

Reaction of calcium hydride and potassium permanganate
◆
ΔrG−1026.4 kJ/mol
K6.57 × 10179
pK−179.82
4CaH2Crystalline solid + KMnO4Ionized aqueous solution
⟶
4CaOCrystalline solid + KCrystalline solid + MnCrystalline solidα + 4H2↑Un-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
−1018.6−1026.42101–
per 1 mol of
−254.65−256.60525.3–
−1018.6−1026.42101–
per 1 mol of
−254.65−256.60525.3–
per 1 mol of
−1018.6−1026.42101–
per 1 mol of
−1018.6−1026.42101–
per 1 mol of
−254.65−256.60525.3–

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]–
KMnO4 (cr)-837.2[1]-737.6[1]171.71[1]117.57[1]
KMnO4 (ai)-793.8[1]-730.5[1]293.7[1]-60.2[1]
* (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
CaO (cr)-635.09[1]-604.03[1]39.75[1]42.80[1]
CaO (g)––––
K (cr)0[1]0[1]64.18[1]29.58[1]
K (g)89.24[1]60.59[1]160.336[1]20.786[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]
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)