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2NH4SCN + 6H2O ๐Ÿ’งโšกโ†’ (NH4)2SO3 + NH4HCO3 + HSCN + 3H2โ†‘

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

Electrolysis of aqueous ammonium thiocyanate yields ammonium sulfite, ammonium hydrogencarbonate, thiocyanic acid, 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

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 thiocyanate2
Reducing
Very soluble in water
H2OWater6
โ€“
Water

Products

Chemical formulaNameCoefficientTypeType in general
equation
(NH4)2SO3Ammonium sulfite1
Oxidized
โ€“
NH4HCO3Ammonium hydrogencarbonate1
โ€“
โ€“
HSCNThiocyanic acid1
โ€“
โ€“
H2Hydrogen3
โ€“
โ€“

Thermodynamic changes

Changes in aqueous solution (1)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
โ—†
ฮ”rG182.5 kJ/mol
K0.11 ร— 10โˆ’31
pK31.97
2NH4SCNIonized aqueous solution + 6H2OLiquid
๐Ÿ’งโšก
โŸถ
(NH4)2SO3Ionized aqueous solution + NH4HCO3Ionized aqueous solution + HSCNUn-ionized aqueous solution + 3H2โ†‘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
โ€“182.5โ€“โ€“
โ€“91.25โ€“โ€“
per 1 mol of
โ€“30.42โ€“โ€“
per 1 mol of
โ€“182.5โ€“โ€“
โ€“182.5โ€“โ€“
per 1 mol of
โ€“182.5โ€“โ€“
per 1 mol of
โ€“60.83โ€“โ€“

Changes in aqueous solution (2)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
โ—†
ฮ”rG235.3 kJ/mol
K0.60 ร— 10โˆ’41
pK41.22
2NH4SCNIonized aqueous solution + 6H2OLiquid
๐Ÿ’งโšก
โŸถ
(NH4)2SO3Ionized aqueous solution + NH4HCO3Ionized aqueous solution + HSCNUn-ionized aqueous solution + 3H2โ†‘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
โ€“235.3โ€“โ€“
โ€“117.7โ€“โ€“
per 1 mol of
โ€“39.22โ€“โ€“
per 1 mol of
โ€“235.3โ€“โ€“
โ€“235.3โ€“โ€“
per 1 mol of
โ€“235.3โ€“โ€“
per 1 mol of
โ€“78.43โ€“โ€“

Changes in aqueous solution (3)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
2NH4SCNIonized aqueous solution + 6H2OLiquid
๐Ÿ’งโšก
โŸถ
(NH4)2SO3Ionized aqueous solution + NH4HCO3Aqueous solution + HSCNUn-ionized aqueous solution + 3H2โ†‘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
โ€“โ€“โ€“โ€“
โ€“โ€“โ€“โ€“
per 1 mol of
โ€“โ€“โ€“โ€“
per 1 mol of
โ€“โ€“โ€“โ€“
โ€“โ€“โ€“โ€“
per 1 mol of
โ€“โ€“โ€“โ€“
per 1 mol of
โ€“โ€“โ€“โ€“

Changes in aqueous solution (4)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
2NH4SCNIonized aqueous solution + 6H2OLiquid
๐Ÿ’งโšก
โŸถ
(NH4)2SO3Ionized aqueous solution + NH4HCO3Aqueous solution + HSCNUn-ionized aqueous solution + 3H2โ†‘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
โ€“โ€“โ€“โ€“
โ€“โ€“โ€“โ€“
per 1 mol of
โ€“โ€“โ€“โ€“
per 1 mol of
โ€“โ€“โ€“โ€“
โ€“โ€“โ€“โ€“
per 1 mol of
โ€“โ€“โ€“โ€“
per 1 mol of
โ€“โ€“โ€“โ€“

Changes in aqueous solution (5)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
โ—†
ฮ”rG177.6 kJ/mol
K0.77 ร— 10โˆ’31
pK31.11
2NH4SCNIonized aqueous solution + 6H2OLiquid
๐Ÿ’งโšก
โŸถ
(NH4)2SO3Ionized aqueous solution + NH4HCO3Ionized aqueous solution + HSCNIonized aqueous solution + 3H2โ†‘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
178.7177.63.6โ€“
89.3588.801.8โ€“
per 1 mol of
29.7829.600.60โ€“
per 1 mol of
178.7177.63.6โ€“
178.7177.63.6โ€“
per 1 mol of
178.7177.63.6โ€“
per 1 mol of
59.5759.201.2โ€“

Changes in aqueous solution (6)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
โ—†
ฮ”rG230.4 kJ/mol
K0.43 ร— 10โˆ’40
pK40.36
2NH4SCNIonized aqueous solution + 6H2OLiquid
๐Ÿ’งโšก
โŸถ
(NH4)2SO3Ionized aqueous solution + NH4HCO3Ionized aqueous solution + HSCNIonized aqueous solution + 3H2โ†‘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
166.1230.41343โ€“
83.05115.2671.5โ€“
per 1 mol of
27.6838.40223.8โ€“
per 1 mol of
166.1230.41343โ€“
166.1230.41343โ€“
per 1 mol of
166.1230.41343โ€“
per 1 mol of
55.3776.80447.7โ€“

Changes in aqueous solution (7)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
2NH4SCNIonized aqueous solution + 6H2OLiquid
๐Ÿ’งโšก
โŸถ
(NH4)2SO3Ionized aqueous solution + NH4HCO3Aqueous solution + HSCNIonized aqueous solution + 3H2โ†‘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
181.5โ€“โ€“โ€“
90.75โ€“โ€“โ€“
per 1 mol of
30.25โ€“โ€“โ€“
per 1 mol of
181.5โ€“โ€“โ€“
181.5โ€“โ€“โ€“
per 1 mol of
181.5โ€“โ€“โ€“
per 1 mol of
60.50โ€“โ€“โ€“

Changes in aqueous solution (8)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
2NH4SCNIonized aqueous solution + 6H2OLiquid
๐Ÿ’งโšก
โŸถ
(NH4)2SO3Ionized aqueous solution + NH4HCO3Aqueous solution + HSCNIonized aqueous solution + 3H2โ†‘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
168.9โ€“โ€“โ€“
84.45โ€“โ€“โ€“
per 1 mol of
28.15โ€“โ€“โ€“
per 1 mol of
168.9โ€“โ€“โ€“
168.9โ€“โ€“โ€“
per 1 mol of
168.9โ€“โ€“โ€“
per 1 mol of
56.30โ€“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
(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€“
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€“
HSCN (ai)76.44[1]92.71[1]144.3[1]-40.2[1]
HSCN (ao)โ€“97.56[1]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, (ai):Ionized aqueous solution, (aq):Aqueous solution, (ao):Un-ionized aqueous solution, (g):Gas

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)