You-iggy
  1. Home
  2. Chemical reactions
  3. 3(NH4)2SO3 ๐Ÿ”ฅโ†’ 6NH2OH + 2H2Sโ†‘ + SO2โ†‘ + H2O

3(NH4)2SO3 ๐Ÿ”ฅโ†’ 6NH2OH + 2H2Sโ†‘ + SO2โ†‘ + H2O

Last updated:
Decomposition of ammonium sulfite
3(NH4)2SO3Ammonium sulfite
๐Ÿ”ฅ
โŸถ
6NH2OHHydroxylamine + 2H2Sโ†‘Hydrogen sulfide + SO2โ†‘Sulfur dioxide + H2OWater

Decomposition of ammonium sulfite yields hydroxylamine, hydrogen sulfide, sulfur dioxide, and water (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 sulfite
3(NH4)2SO3Ammonium sulfite
๐Ÿ”ฅ
โŸถ
6NH2OHHydroxylamine + 2H2Sโ†‘Hydrogen sulfide + SO2โ†‘Sulfur dioxide + H2OWater

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 sulfite

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
(NH4)2SO3Ammonium sulfite3
Self redox agent
Thermally decomposable
Oxoacid salt

Products

Chemical formulaNameCoefficientTypeType in general
equation
NH2OHHydroxylamine6
Oxidized
โ€“
H2SHydrogen sulfide2
Reduced
โ€“
SO2Sulfur dioxide1
โ€“
โ€“
H2OWater1
โ€“
โ€“

Thermodynamic changes

Changes in standard condition

Decomposition of ammonium sulfite
3(NH4)2SO3Crystalline solid
๐Ÿ”ฅ
โŸถ
6NH2OHCrystalline solid + 2H2Sโ†‘Gas + SO2โ†‘Gas + H2OLiquid
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
1346.8โ€“โ€“โ€“
per 1 mol of
448.93โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
224.47โ€“โ€“โ€“
per 1 mol of
673.40โ€“โ€“โ€“
per 1 mol of
1346.8โ€“โ€“โ€“
per 1 mol of
1346.8โ€“โ€“โ€“

Changes in aqueous solution (1)

Decomposition of ammonium sulfite
3(NH4)2SO3Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
6NH2OHAqueous solution + 2H2Sโ†‘Gas + SO2โ†‘Gas + H2OLiquid
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
1487.5โ€“โ€“โ€“
per 1 mol of
495.83โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
247.92โ€“โ€“โ€“
per 1 mol of
743.75โ€“โ€“โ€“
per 1 mol of
1487.5โ€“โ€“โ€“
per 1 mol of
1487.5โ€“โ€“โ€“

Changes in aqueous solution (2)

Decomposition of ammonium sulfite
3(NH4)2SO3Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
6NH2OHAqueous solution + 2H2Sโ†‘Gas + SO2โ†‘Un-ionized aqueous solution + H2OLiquid
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
1461.3โ€“โ€“โ€“
per 1 mol of
487.10โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
243.55โ€“โ€“โ€“
per 1 mol of
730.65โ€“โ€“โ€“
per 1 mol of
1461.3โ€“โ€“โ€“
per 1 mol of
1461.3โ€“โ€“โ€“

Changes in aqueous solution (3)

Decomposition of ammonium sulfite
3(NH4)2SO3Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
6NH2OHAqueous solution + 2H2Sโ†‘Un-ionized aqueous solution + SO2โ†‘Gas + H2OLiquid
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
1449.3โ€“โ€“โ€“
per 1 mol of
483.10โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
241.55โ€“โ€“โ€“
per 1 mol of
724.65โ€“โ€“โ€“
per 1 mol of
1449.3โ€“โ€“โ€“
per 1 mol of
1449.3โ€“โ€“โ€“

Changes in aqueous solution (4)

Decomposition of ammonium sulfite
3(NH4)2SO3Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
6NH2OHAqueous solution + 2H2Sโ†‘Un-ionized aqueous solution + SO2โ†‘Un-ionized aqueous solution + H2OLiquid
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
1423.2โ€“โ€“โ€“
per 1 mol of
474.40โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
237.20โ€“โ€“โ€“
per 1 mol of
711.60โ€“โ€“โ€“
per 1 mol of
1423.2โ€“โ€“โ€“
per 1 mol of
1423.2โ€“โ€“โ€“

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)2SO3 (cr)-885.3[1]โ€“โ€“โ€“
(NH4)2SO3 (ai)-900.4[1]-645.0[1]197.5[1]โ€“
(NH4)2SO3 (cr)
1 hydrate
-1187.4[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
NH2OH (cr)-114.2[1]โ€“โ€“โ€“
NH2OH (aq)-98.3[1]โ€“โ€“โ€“
H2S (g)-20.63[1]-33.56[1]205.79[1]34.23[1]
H2S (ao)-39.7[1]-27.83[1]121[1]โ€“
SO2 (l)-320.5[1]โ€“โ€“โ€“
SO2 (g)-296.830[1]-300.194[1]248.22[1]39.87[1]
SO2 (ao)-322.980[1]-300.676[1]161.9[1]โ€“
H2O (cr)โ€“โ€“โ€“โ€“
H2O (l)-285.830[1]-237.129[1]69.91[1]75.291[1]
H2O (g)-241.818[1]-228.572[1]188.825[1]33.577[1]
* (cr):Crystalline solid, (aq):Aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution, (l):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)