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6(NH4)2B4O7 🔥→ 12NO↑ + 5B2H6↑ + 6H3BO3 + 4B2O3

Decomposition of ammonium tetraborate yields nitrogen monoxide, diborane(6), boric acid, and diboron trioxide (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

Thermal decomposition with redox
Thermally decomposable substanceSelf redox agent
🔥
ProductOxidation product + ProductReduction product
Thermal decomposition of oxoacid salt with redox
Oxoacid saltSelf redox agent
🔥
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Decomposition of ammonium tetraborate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
(NH4)2B4O7Ammonium tetraborate6
Self redox agent
Thermally decomposable
Oxoacid salt

Products

Chemical formulaNameCoefficientTypeType in general
equation
NONitrogen monoxide12
Oxidized
B2H6Diborane(6)5
Reduced
H3BO3Boric acid6
B2O3Diboron trioxide4

Thermodynamic changes

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
(NH4)2B4O7

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
NO (g)90.25[1]86.55[1]210.761[1]29.844[1]
B2H6 (g)35.6[1]86.7[1]232.11[1]56.90[1]
H3BO3 (cr)-1094.33[1]-968.92[1]88.83[1]81.38[1]
H3BO3 (g)-994.1[1]
H3BO3 (ao)-1072.32[1]-968.75[1]162.3[1]
B2O3 (cr)-1272.77[1]-1193.65[1]53.97[1]62.93[1]
B2O3 (am)-1254.53[1]-1182.3[1]77.8[1]61.1[1]
B2O3 (g)-843.79[1]-831.97[1]279.81[1]66.86[1]
* (g):Gas, (cr):Crystalline solid, (ao):Un-ionized aqueous solution, (am):Amorphous solid

References

List of references

  1. 1