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NH4SCN + 4H2O ๐Ÿ’งโšกโ†’ NH2OH + S + NH4HCO3 + 2H2โ†‘

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Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNAmmonium thiocyanate + 4H2OWater
๐Ÿ’งโšก
โŸถ
NH2OHHydroxylamine + SSulfur + NH4HCO3Ammonium hydrogencarbonate + 2H2โ†‘Hydrogen

Electrolysis of aqueous ammonium thiocyanate yields hydroxylamine, sulfur, ammonium hydrogencarbonate, and hydrogen (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

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNAmmonium thiocyanate + 4H2OWater
๐Ÿ’งโšก
โŸถ
NH2OHHydroxylamine + SSulfur + NH4HCO3Ammonium hydrogencarbonate + 2H2โ†‘Hydrogen

General equation

Electrolysis of aqueous solution with water as non redox agent
Miscible with water/Very soluble in water/Soluble in waterSelf redox agent + H2ONon-redox agent
๐Ÿ’งโšก
โŸถ
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NH4SCNAmmonium thiocyanate1
Reducing
Very soluble in water
H2OWater4
โ€“
Water

Products

Chemical formulaNameCoefficientTypeType in general
equation
NH2OHHydroxylamine1
Oxidized
โ€“
SSulfur1
Oxidized
โ€“
NH4HCO3Ammonium hydrogencarbonate1
โ€“
โ€“
H2Hydrogen2
โ€“
โ€“

Thermodynamic changes

Changes in standard condition (1)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNCrystalline solid + 4H2OLiquid
๐Ÿ’งโšก
โŸถ
NH2OHCrystalline solid + SCrystalline solidrhombic + NH4HCO3Crystalline solid + 2H2โ†‘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
258.4โ€“โ€“โ€“
258.4โ€“โ€“โ€“
per 1 mol of
64.60โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
258.4โ€“โ€“โ€“
per 1 mol of
258.4โ€“โ€“โ€“
258.4โ€“โ€“โ€“
per 1 mol of
129.2โ€“โ€“โ€“

Changes in standard condition (2)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNCrystalline solid + 4H2OLiquid
๐Ÿ’งโšก
โŸถ
NH2OHCrystalline solid + SCrystalline solidmonoclinic + NH4HCO3Crystalline solid + 2H2โ†‘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
258.8โ€“โ€“โ€“
258.8โ€“โ€“โ€“
per 1 mol of
64.70โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
258.8โ€“โ€“โ€“
per 1 mol of
258.8โ€“โ€“โ€“
258.8โ€“โ€“โ€“
per 1 mol of
129.4โ€“โ€“โ€“

Changes in aqueous solution (1)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNIonized aqueous solution + 4H2OLiquid
๐Ÿ’งโšก
โŸถ
NH2OHAqueous solution + SCrystalline solidrhombic + NH4HCO3Ionized aqueous solution + 2H2โ†‘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
276.6โ€“โ€“โ€“
276.6โ€“โ€“โ€“
per 1 mol of
69.15โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
276.6โ€“โ€“โ€“
per 1 mol of
276.6โ€“โ€“โ€“
276.6โ€“โ€“โ€“
per 1 mol of
138.3โ€“โ€“โ€“

Changes in aqueous solution (2)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNIonized aqueous solution + 4H2OLiquid
๐Ÿ’งโšก
โŸถ
NH2OHAqueous solution + SCrystalline solidrhombic + NH4HCO3Ionized aqueous solution + 2H2โ†‘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
268.2โ€“โ€“โ€“
268.2โ€“โ€“โ€“
per 1 mol of
67.05โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
268.2โ€“โ€“โ€“
per 1 mol of
268.2โ€“โ€“โ€“
268.2โ€“โ€“โ€“
per 1 mol of
134.1โ€“โ€“โ€“

Changes in aqueous solution (3)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNIonized aqueous solution + 4H2OLiquid
๐Ÿ’งโšก
โŸถ
NH2OHAqueous solution + SCrystalline solidrhombic + NH4HCO3Aqueous solution + 2H2โ†‘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
279.4โ€“โ€“โ€“
279.4โ€“โ€“โ€“
per 1 mol of
69.85โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
279.4โ€“โ€“โ€“
per 1 mol of
279.4โ€“โ€“โ€“
279.4โ€“โ€“โ€“
per 1 mol of
139.7โ€“โ€“โ€“

Changes in aqueous solution (4)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNIonized aqueous solution + 4H2OLiquid
๐Ÿ’งโšก
โŸถ
NH2OHAqueous solution + SCrystalline solidrhombic + NH4HCO3Aqueous solution + 2H2โ†‘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
271.0โ€“โ€“โ€“
271.0โ€“โ€“โ€“
per 1 mol of
67.75โ€“โ€“โ€“
per 1 mol of
Hydroxylamine
271.0โ€“โ€“โ€“
per 1 mol of
271.0โ€“โ€“โ€“
271.0โ€“โ€“โ€“
per 1 mol of
135.5โ€“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
NH4SCN (cr)-78.7[1]โ€“โ€“โ€“
NH4SCN (ai)-56.07[1]13.40[1]257.7[1]39.7[1]
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, (ai):Ionized aqueous solution, (l):Liquid, (g):Gas

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€“
S (cr)
rhombic
0[1]0[1]31.80[1]22.64[1]
S (cr)
monoclinic
0.33[1]โ€“โ€“โ€“
S (g)278.805[1]238.250[1]167.821[1]23.673[1]
NH4HCO3 (cr)-849.4[1]-665.9[1]120.9[1]โ€“
NH4HCO3 (ai)-824.50[1]-666.07[1]204.6[1]โ€“
NH4HCO3 (aq)-821.7[1]โ€“โ€“โ€“
H2 (g)0[1]0[1]130.684[1]28.824[1]
H2 (ao)-4.2[1]17.6[1]577[1]โ€“
* (cr):Crystalline solid, (aq):Aqueous solution, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution

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)