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  3. 6(NH4)3PO4 ๐Ÿ”ฅโ†’ 18NH3โ†‘ + 6P + 9H2โ†‘ + 8O3โ†‘

6(NH4)3PO4 ๐Ÿ”ฅโ†’ 18NH3โ†‘ + 6P + 9H2โ†‘ + 8O3โ†‘

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Decomposition of ammonium phosphate
6(NH4)3PO4Ammonium phosphate
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Ammonia + 6PPhosphorus + 9H2โ†‘Hydrogen + 8O3โ†‘Ozone

Decomposition of ammonium phosphate yields ammonia, phosphorus, hydrogen, and ozone (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

Decomposition of ammonium phosphate
6(NH4)3PO4Ammonium phosphate
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Ammonia + 6PPhosphorus + 9H2โ†‘Hydrogen + 8O3โ†‘Ozone

General equation

Thermal decomposition with redox
Thermally decomposable substanceSelf redox agent
๐Ÿ”ฅ
โŸถ
ProductOxidation product + ProductReduction product
Thermal decomposition of oxoacid salt with redox
Oxoacid saltSelf redox agent
๐Ÿ”ฅ
โŸถ
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Decomposition of ammonium phosphate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
(NH4)3PO4Ammonium phosphate6
Self redox agent
Thermally decomposable
Oxoacid salt

Products

Chemical formulaNameCoefficientTypeType in general
equation
NH3Ammonia18
โ€“
โ€“
PPhosphorus6
Reduced
โ€“
H2Hydrogen9
Reduced
โ€“
O3Ozone8
Oxidized
โ€“

Thermodynamic changes

Changes in standard condition (1)

Decomposition of ammonium phosphate
6(NH4)3PO4Crystalline solid
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Gas + 6PCrystalline solidwhite + 9H2โ†‘Gas + 8O3โ†‘Gas
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
10343.0โ€“โ€“โ€“
per 1 mol of
1723.83โ€“โ€“โ€“
per 1 mol of
574.611โ€“โ€“โ€“
per 1 mol of
1723.83โ€“โ€“โ€“
per 1 mol of
1149.22โ€“โ€“โ€“
per 1 mol of
1292.88โ€“โ€“โ€“

Changes in standard condition (2)

Decomposition of ammonium phosphate
6(NH4)3PO4Crystalline solid
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Gas + 6PCrystalline solidred, triclinic + 9H2โ†‘Gas + 8O3โ†‘Gas
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
10237.4โ€“โ€“โ€“
per 1 mol of
1706.23โ€“โ€“โ€“
per 1 mol of
568.744โ€“โ€“โ€“
per 1 mol of
1706.23โ€“โ€“โ€“
per 1 mol of
1137.49โ€“โ€“โ€“
per 1 mol of
1279.67โ€“โ€“โ€“

Changes in standard condition (3)

Decomposition of ammonium phosphate
6(NH4)3PO4Crystalline solid
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Gas + 6PCrystalline solidblack + 9H2โ†‘Gas + 8O3โ†‘Gas
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
10107.2โ€“โ€“โ€“
per 1 mol of
1684.53โ€“โ€“โ€“
per 1 mol of
561.511โ€“โ€“โ€“
per 1 mol of
1684.53โ€“โ€“โ€“
per 1 mol of
1123.02โ€“โ€“โ€“
per 1 mol of
1263.40โ€“โ€“โ€“

Changes in standard condition (4)

Decomposition of ammonium phosphate
6(NH4)3PO4Crystalline solid
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Gas + 6PAmorphous solidred + 9H2โ†‘Gas + 8O3โ†‘Gas
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
10298.0โ€“โ€“โ€“
per 1 mol of
1716.33โ€“โ€“โ€“
per 1 mol of
572.111โ€“โ€“โ€“
per 1 mol of
1716.33โ€“โ€“โ€“
per 1 mol of
1144.22โ€“โ€“โ€“
per 1 mol of
1287.25โ€“โ€“โ€“

Changes in aqueous solution (1)

Decomposition of ammonium phosphate
โ—†
ฮ”rG8549.1 kJ/mol
K0.18 ร— 10โˆ’1497
pK1497.74
6(NH4)3PO4Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Gas + 6PCrystalline solidwhite + 9H2โ†‘Gas + 8O3โ†‘Gas
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
10361.08549.16096โ€“
per 1 mol of
1726.831424.91016โ€“
per 1 mol of
575.611474.95338.7โ€“
per 1 mol of
1726.831424.91016โ€“
per 1 mol of
1151.22949.90677.3โ€“
per 1 mol of
1295.131068.6762.0โ€“

Changes in aqueous solution (2)

Decomposition of ammonium phosphate
โ—†
ฮ”rG8636.3 kJ/mol
K0.97 ร— 10โˆ’1513
pK1513.01
6(NH4)3PO4Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Gas + 6PCrystalline solidwhite + 9H2โ†‘Gas + 8O3โ†‘Un-ionized aqueous solution
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
10226.68636.35353โ€“
per 1 mol of
1704.431439.4892.2โ€“
per 1 mol of
568.144479.79297.4โ€“
per 1 mol of
1704.431439.4892.2โ€“
per 1 mol of
1136.29959.59594.8โ€“
per 1 mol of
1278.331079.5669.1โ€“

Changes in aqueous solution (3)

Decomposition of ammonium phosphate
โ—†
ฮ”rG8707.5 kJ/mol
K0.33 ร— 10โˆ’1525
pK1525.49
6(NH4)3PO4Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Gas + 6PCrystalline solidwhite + 9H2โ†‘Un-ionized aqueous solution + 8O3โ†‘Gas
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
10323.28707.510113โ€“
per 1 mol of
1720.531451.31685.5โ€“
per 1 mol of
573.511483.75561.83โ€“
per 1 mol of
1720.531451.31685.5โ€“
per 1 mol of
1147.02967.501123.7โ€“
per 1 mol of
1290.401088.41264.1โ€“

Changes in aqueous solution (4)

Decomposition of ammonium phosphate
โ—†
ฮ”rG8794.7 kJ/mol
K0.17 ร— 10โˆ’1540
pK1540.76
6(NH4)3PO4Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Gas + 6PCrystalline solidwhite + 9H2โ†‘Un-ionized aqueous solution + 8O3โ†‘Un-ionized aqueous solution
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
10188.88794.79370โ€“
per 1 mol of
1698.131465.81562โ€“
per 1 mol of
566.044488.59520.6โ€“
per 1 mol of
1698.131465.81562โ€“
per 1 mol of
1132.09977.191041โ€“
per 1 mol of
1273.601099.31171โ€“

Changes in aqueous solution (5)

Decomposition of ammonium phosphate
โ—†
ฮ”rG8368.2 kJ/mol
K0.90 ร— 10โˆ’1466
pK1466.05
6(NH4)3PO4Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Un-ionized aqueous solution + 6PCrystalline solidwhite + 9H2โ†‘Gas + 8O3โ†‘Gas
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
9745.88368.24636โ€“
per 1 mol of
1624.31394.7772.7โ€“
per 1 mol of
541.43464.90257.6โ€“
per 1 mol of
1624.31394.7772.7โ€“
per 1 mol of
1082.9929.80515.1โ€“
per 1 mol of
1218.21046.0579.5โ€“

Changes in aqueous solution (6)

Decomposition of ammonium phosphate
โ—†
ฮ”rG8455.4 kJ/mol
K0.48 ร— 10โˆ’1481
pK1481.32
6(NH4)3PO4Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Un-ionized aqueous solution + 6PCrystalline solidwhite + 9H2โ†‘Gas + 8O3โ†‘Un-ionized aqueous solution
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
9611.48455.43892โ€“
per 1 mol of
1601.91409.2648.7โ€“
per 1 mol of
533.97469.74216.2โ€“
per 1 mol of
1601.91409.2648.7โ€“
per 1 mol of
1067.9939.49432.4โ€“
per 1 mol of
1201.41056.9486.5โ€“

Changes in aqueous solution (7)

Decomposition of ammonium phosphate
โ—†
ฮ”rG8526.6 kJ/mol
K0.16 ร— 10โˆ’1493
pK1493.80
6(NH4)3PO4Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Un-ionized aqueous solution + 6PCrystalline solidwhite + 9H2โ†‘Un-ionized aqueous solution + 8O3โ†‘Gas
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
9708.08526.68652โ€“
per 1 mol of
1618.01421.11442โ€“
per 1 mol of
539.33473.70480.7โ€“
per 1 mol of
1618.01421.11442โ€“
per 1 mol of
1078.7947.40961.3โ€“
per 1 mol of
1213.51065.81082โ€“

Changes in aqueous solution (8)

Decomposition of ammonium phosphate
โ—†
ฮ”rG8613.8 kJ/mol
K0.85 ร— 10โˆ’1509
pK1509.07
6(NH4)3PO4Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
18NH3โ†‘Un-ionized aqueous solution + 6PCrystalline solidwhite + 9H2โ†‘Un-ionized aqueous solution + 8O3โ†‘Un-ionized aqueous solution
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
9573.68613.87909โ€“
per 1 mol of
1595.61435.61318โ€“
per 1 mol of
531.87478.54439.4โ€“
per 1 mol of
1595.61435.61318โ€“
per 1 mol of
1063.7957.09878.8โ€“
per 1 mol of
1196.71076.7988.6โ€“

Thermodynamic data of reactants

Chemical formulaStandard enthalpy
of formation
ฮ”fHยฐ
kJ ยท molโˆ’1		Standard Gibbs
energy of
formation
ฮ”fGยฐ
kJ ยท molโˆ’1		Standard
molar entropy
Sยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard molar
heat capacity at
constant pressure
Cpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
(NH4)3PO4 (cr)-1671.9[1]โ€“โ€“โ€“
(NH4)3PO4 (ai)-1674.9[1]-1256.6[1]117[1]โ€“
(NH4)3PO4 (cr)
3 hydrate
-2555.6[1]โ€“โ€“โ€“
* (cr):Crystalline solid, (ai):Ionized aqueous solution

Thermodynamic data of products

Chemical formulaStandard enthalpy
of formation
ฮ”fHยฐ
kJ ยท molโˆ’1		Standard Gibbs
energy of
formation
ฮ”fGยฐ
kJ ยท molโˆ’1		Standard
molar entropy
Sยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard molar
heat capacity at
constant pressure
Cpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
NH3 (g)-46.11[1]-16.45[1]192.45[1]35.06[1]
NH3 (ao)-80.29[1]-26.50[1]111.3[1]โ€“
P (cr)
white
0[1]0[1]41.09[1]23.84[1]
P (cr)
red, triclinic
-17.6[1]-12.1[1]22.80[1]21.21[1]
P (cr)
black
-39.3[1]โ€“โ€“โ€“
P (am)
red
-7.5[1]โ€“โ€“โ€“
P (g)314.64[1]278.25[1]163.193[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]โ€“
O3 (g)142.7[1]163.2[1]238.93[1]39.20[1]
O3 (ao)125.9[1]174.1[1]146[1]โ€“
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (am):Amorphous solid

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)