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6Na + 2KNO3 → 3Na2O + 2NO↑ + K2O

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Reaction of sodium and potassium nitrate
6NaSodium + 2KNO3Potassium nitrate
⟶
3Na2OSodium oxide + 2NO↑Nitrogen monoxide + K2OPotassium oxide

The reaction of sodium and potassium nitrate yields sodium oxide, nitrogen monoxide, and potassium oxide (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 potassium nitrate
6NaSodium + 2KNO3Potassium nitrate
⟶
3Na2OSodium oxide + 2NO↑Nitrogen monoxide + K2OPotassium oxide

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 sodium and potassium nitrate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NaSodium6
Reducing
Reducing
KNO3Potassium nitrate2
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
Na2OSodium oxide3
Oxidized
–
NONitrogen monoxide2
Reduced
–
K2OPotassium oxide1
–
–

Thermodynamic changes

Changes in standard condition

Reaction of sodium and potassium nitrate
◆
ΔrG−485.7 kJ/mol
K1.23 × 1085
pK−85.09
6NaCrystalline solid + 2KNO3Crystalline solid
⟶
3Na2OCrystalline solid + 2NO↑Gas + K2OCrystalline solid
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
−434.4−485.7167.4−11.5
per 1 mol of
−72.40−80.9527.90−1.92
per 1 mol of
−217.2−242.883.70−5.75
per 1 mol of
−144.8−161.955.80−3.83
per 1 mol of
−217.2−242.883.70−5.75
per 1 mol of
−434.4−485.7167.4−11.5

Changes in aqueous solution

Reaction of sodium and potassium nitrate
◆
ΔrG−486.3 kJ/mol
K1.57 × 1085
pK−85.20
6NaCrystalline solid + 2KNO3Ionized aqueous solution
⟶
3Na2OCrystalline solid + 2NO↑Gas + K2OCrystalline solid
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
−504.2−486.3−64.3311.1
per 1 mol of
−84.03−81.05−10.751.85
per 1 mol of
−252.1−243.2−32.1155.6
per 1 mol of
−168.1−162.1−21.4103.7
per 1 mol of
−252.1−243.2−32.1155.6
per 1 mol of
−504.2−486.3−64.3311.1

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]
KNO3 (cr)-494.63[1]-394.86[1]133.05[1]96.40[1]
KNO3 (ai)-459.74[1]-394.53[1]248.9[1]-64.9[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]
NO (g)90.25[1]86.55[1]210.761[1]29.844[1]
K2O (cr)-361.5[1]-322.1[2]94.1[2]83.7[2]
K2O (g)-63[1]–––
* (cr):Crystalline solid, (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)
    • 2
      James G. Speight (2017)
      Lange's Handbook of Chemistry, 17th edition
      McGraw Hill Education