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2Be + Mg(OH)2 → 2BeO + Mg + H2

The reaction of beryllium and magnesium hydroxide yields beryllium oxide, magnesium, 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 reducible species
Reducing speciesReducing agent + Reducible speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
BeBeryllium2
Reducing
Reducing
Mg(OH)2Magnesium hydroxide1
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
BeOBeryllium oxide2
Oxidized
MgMagnesium1
Reduced
H2Hydrogen1
Reduced

Thermodynamic changes

Changes in standard condition (1)

Reaction of beryllium and magnesium hydroxide
ΔrG−327.1 kJ/mol
K2.02 × 1057
pK−57.31
2BeCrystalline solid + Mg(OH)2Crystalline solid
2BeOCrystalline solid + MgCrystalline solid + 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
−294.7−327.1109.46−5.16
per 1 mol of
−147.3−163.654.730−2.58
−294.7−327.1109.46−5.16
per 1 mol of
−147.3−163.654.730−2.58
per 1 mol of
−294.7−327.1109.46−5.16
per 1 mol of
−294.7−327.1109.46−5.16

Changes in standard condition (2)

Reaction of beryllium and magnesium hydroxide
2BeCrystalline solid + Mg(OH)2Amorphous solidprecipitated
2BeOCrystalline solid + MgCrystalline solid + 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
−298.7
per 1 mol of
−149.3
−298.7
per 1 mol of
−149.3
per 1 mol of
−298.7
per 1 mol of
−298.7

Changes in aqueous solution (1)

Reaction of beryllium and magnesium hydroxide
ΔrG−327.1 kJ/mol
K2.02 × 1057
pK−57.31
2BeCrystalline solid + Mg(OH)2Crystalline solid
2BeOCrystalline solid + MgCrystalline solid + 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
−294.7−327.1109.46−5.16
per 1 mol of
−147.3−163.654.730−2.58
−294.7−327.1109.46−5.16
per 1 mol of
−147.3−163.654.730−2.58
per 1 mol of
−294.7−327.1109.46−5.16
per 1 mol of
−294.7−327.1109.46−5.16

Changes in aqueous solution (2)

Reaction of beryllium and magnesium hydroxide
ΔrG−309.5 kJ/mol
K1.67 × 1054
pK−54.22
2BeCrystalline solid + Mg(OH)2Crystalline solid
2BeOCrystalline solid + MgCrystalline solid + 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
−298.9−309.5556
per 1 mol of
−149.4−154.8278
−298.9−309.5556
per 1 mol of
−149.4−154.8278
per 1 mol of
−298.9−309.5556
per 1 mol of
−298.9−309.5556

Changes in aqueous solution (3)

Reaction of beryllium and magnesium hydroxide
2BeCrystalline solid + Mg(OH)2Amorphous solidprecipitated
2BeOCrystalline solid + MgCrystalline solid + 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
−298.7
per 1 mol of
−149.3
−298.7
per 1 mol of
−149.3
per 1 mol of
−298.7
per 1 mol of
−298.7

Changes in aqueous solution (4)

Reaction of beryllium and magnesium hydroxide
2BeCrystalline solid + Mg(OH)2Amorphous solidprecipitated
2BeOCrystalline solid + MgCrystalline solid + 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
−302.9
per 1 mol of
−151.4
−302.9
per 1 mol of
−151.4
per 1 mol of
−302.9
per 1 mol of
−302.9

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
Be (cr)0[1]0[1]9.50[1]16.44[1]
Be (g)324.3[1]286.6[1]136.269[1]20.786[1]
Mg(OH)2 (cr)-924.54[1]-833.51[1]63.18[1]77.03[1]
Mg(OH)2 (am)
precipitated
-920.5[1]
Mg(OH)2 (g)-561[1]
Mg(OH)2 (ai)-926.84[1]-769.4[1]-159.4[1]
* (cr):Crystalline solid, (g):Gas, (am):Amorphous 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
BeO (cr)-609.6[1]-580.3[1]14.14[1]25.52[1]
BeO (g)117[1]
Mg (cr)0[1]0[1]32.68[1]24.89[1]
Mg (g)147.70[1]113.10[1]148.650[1]20.786[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