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2(NH4)3PO4 → 3N2↑ + 2H2PO4 + 20H+ + 18e

Oxidation of ammonium phosphate
2(NH4)3PO4Ammonium phosphate
3N2Nitrogen + 2H2PO4Dihydrogenphosphate ion + 20H+Hydrogen ion + 18eElectron

Oxidation of ammonium phosphate yields nitrogen, dihydrogenphosphate ion, hydrogen ion (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

Oxidation of ammonium phosphate
2(NH4)3PO4Ammonium phosphate
3N2Nitrogen + 2H2PO4Dihydrogenphosphate ion + 20H+Hydrogen ion + 18eElectron

General equation

Oxidation of oxidizable species
ReactantReducing agent
ProductOxidation product + e

Oxidation state of each atom

Oxidation of ammonium phosphate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
(NH4)3PO4Ammonium phosphate2
Reducing

Products

Chemical formulaNameCoefficientTypeType in general
equation
N2Nitrogen3
Oxidized
H2PO4Dihydrogenphosphate ion2
H+Hydrogen ion20
eElectron18
Electron

Thermodynamic changes

Changes in standard condition

Oxidation of ammonium phosphate
ΔrG252.6 kJ/mol
K0.56 × 10−44
pK44.25
2(NH4)3PO4Ionized aqueous solution
3N2Gas + 2H2PO4Un-ionized aqueous solution + 20H+Un-ionized aqueous solution + 18e
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
757.2252.6522
per 1 mol of
378.6126.3261
per 1 mol of
252.484.20174
per 1 mol of
Dihydrogenphosphate ion
378.6126.3261
per 1 mol of
Hydrogen ion
37.8612.6326.1
per 1 mol of
Electron
42.0714.0329.0

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)3PO4 (cr)-1671.9[1]
(NH4)3PO4 (ai)-1674.9[1]-1256.6[1]117[1]
(NH4)3PO4 (cr)
3 hydrate
-2555.6[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
N2 (g)0[1]0[1]191.61[1]29.125[1]
H2PO4 (ao)-1296.29[1]-1130.28[1]90.4[1]
H+ (g)1536.202[1]
H+ (ao)0[1]0[1]0[1]0[1]
e
* (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1