You-iggy
  1. Home
  2. Chemical reactions
  3. 6Na + Na2SeO4 → 4Na2O + Se

6Na + Na2SeO4 → 4Na2O + Se

Last updated:
Reaction of sodium and sodium selenate
6NaSodium + Na2SeO4Sodium selenate
⟶
4Na2OSodium oxide + SeSelenium

The reaction of sodium and sodium selenate yields sodium oxide and selenium (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 sodium and sodium selenate
6NaSodium + Na2SeO4Sodium selenate
⟶
4Na2OSodium oxide + SeSelenium

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 sodium and sodium selenate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NaSodium6
Reducing
Reducing
Na2SeO4Sodium selenate1
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
Na2OSodium oxide4
Oxidized
–
SeSelenium1
Reduced
–

Thermodynamic changes

Changes in standard condition (1)

Reaction of sodium and sodium selenate
6NaCrystalline solid + Na2SeO4Crystalline solid
⟶
4Na2OCrystalline solid + SeCrystalline solidhexagonal, gray
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
−587.9–––
per 1 mol of
−97.98–––
per 1 mol of
−587.9–––
per 1 mol of
−147.0–––
per 1 mol of
−587.9–––

Changes in standard condition (2)

Reaction of sodium and sodium selenate
6NaCrystalline solid + Na2SeO4Crystalline solid
⟶
4Na2OCrystalline solid + SeCrystalline solidmonoclinic, red
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
−581.2–––
per 1 mol of
−96.87–––
per 1 mol of
−581.2–––
per 1 mol of
−145.3–––
per 1 mol of
−581.2–––

Changes in aqueous solution

Reaction of sodium and sodium selenate
◆
ΔrG−536.6 kJ/mol
K1.02 × 1094
pK−94.01
6NaCrystalline solid + Na2SeO4Ionized aqueous solution
⟶
4Na2OCrystalline solid + SeCrystalline solidhexagonal, gray
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
−577.4−536.6−136.6–
per 1 mol of
−96.23−89.43−22.77–
per 1 mol of
−577.4−536.6−136.6–
per 1 mol of
−144.3−134.2−34.15–
per 1 mol of
−577.4−536.6−136.6–

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
Na (cr)0[1]0[1]51.21[1]28.24[1]
Na (g)107.32[1]76.761[1]153.712[1]20.786[1]
Na2SeO4 (cr)-1069.0[1]–––
Na2SeO4 (ai)-1079.5[1]-965.2[1]172.0[1]–
Na2SeO4 (cr)
10 hydrate
-4006.6[1]–––
* (cr):Crystalline solid, (g):Gas, (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
Na2O (cr)-414.22[1]-375.46[1]75.06[1]69.12[1]
Na2O (g)-35.6[1]-52.3[1]261.2[1]55.2[1]
Se (cr)
hexagonal, gray
0[1]0[1]42.442[1]25.363[1]
Se (cr)
monoclinic, red
6.7[1]–––
Se (vit)5.0[1]–––
Se (g)227.07[1]187.03[1]176.72[1]20.820[1]
* (cr):Crystalline solid, (g):Gas, (vit):Vitreous liquid

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)