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2NH4SCN + 8H2O 💧⚡→ NH4NO2 + 2H2S↑ + 2NH4HCO3 + 3H2

Electrolysis of aqueous ammonium thiocyanate yields ammonium nitrite, hydrogen sulfide, 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

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
💧⚡
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
H2OWater8
Water

Products

Chemical formulaNameCoefficientTypeType in general
equation
NH4NO2Ammonium nitrite1
Oxidized
H2SHydrogen sulfide2
NH4HCO3Ammonium hydrogencarbonate2
H2Hydrogen3

Thermodynamic changes

Changes in standard condition

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
2NH4SCNCrystalline solid + 8H2OLiquid
💧⚡
NH4NO2Crystalline solid + 2H2SGas + 2NH4HCO3Crystalline solid + 3H2Gas
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
447.5
223.8
per 1 mol of
55.94
per 1 mol of
447.5
per 1 mol of
223.8
223.8
per 1 mol of
149.2

Changes in aqueous solution (1)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
ΔrG359.4 kJ/mol
K0.11 × 10−62
pK62.96
2NH4SCNIonized aqueous solution + 8H2OLiquid
💧⚡
NH4NO2Ionized aqueous solution + 2H2SGas + 2NH4HCO3Ionized aqueous solution + 3H2Gas
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
471.3359.4374.6
235.7179.7187.3
per 1 mol of
58.9144.9246.83
per 1 mol of
471.3359.4374.6
per 1 mol of
235.7179.7187.3
235.7179.7187.3
per 1 mol of
157.1119.8124.9

Changes in aqueous solution (2)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
ΔrG412.2 kJ/mol
K0.61 × 10−72
pK72.21
2NH4SCNIonized aqueous solution + 8H2OLiquid
💧⚡
NH4NO2Ionized aqueous solution + 2H2SGas + 2NH4HCO3Ionized aqueous solution + 3H2Un-ionized aqueous solution
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
458.7412.21714
229.3206.1857.0
per 1 mol of
57.3451.52214.3
per 1 mol of
458.7412.21714
per 1 mol of
229.3206.1857.0
229.3206.1857.0
per 1 mol of
152.9137.4571.3

Changes in aqueous solution (3)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
2NH4SCNIonized aqueous solution + 8H2OLiquid
💧⚡
NH4NO2Ionized aqueous solution + 2H2SGas + 2NH4HCO3Aqueous solution + 3H2Gas
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
476.9
238.4
per 1 mol of
59.61
per 1 mol of
476.9
per 1 mol of
238.4
238.4
per 1 mol of
159.0

Changes in aqueous solution (4)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
2NH4SCNIonized aqueous solution + 8H2OLiquid
💧⚡
NH4NO2Ionized aqueous solution + 2H2SGas + 2NH4HCO3Aqueous solution + 3H2Un-ionized aqueous solution
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
464.3
232.2
per 1 mol of
58.04
per 1 mol of
464.3
per 1 mol of
232.2
232.2
per 1 mol of
154.8

Changes in aqueous solution (5)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
ΔrG370.8 kJ/mol
K0.11 × 10−64
pK64.96
2NH4SCNIonized aqueous solution + 8H2OLiquid
💧⚡
NH4NO2Ionized aqueous solution + 2H2SUn-ionized aqueous solution + 2NH4HCO3Ionized aqueous solution + 3H2Gas
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
433.2370.8205
216.6185.4103
per 1 mol of
54.1546.3525.6
per 1 mol of
433.2370.8205
per 1 mol of
216.6185.4103
216.6185.4103
per 1 mol of
144.4123.668.3

Changes in aqueous solution (6)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
ΔrG423.6 kJ/mol
K0.61 × 10−74
pK74.21
2NH4SCNIonized aqueous solution + 8H2OLiquid
💧⚡
NH4NO2Ionized aqueous solution + 2H2SUn-ionized aqueous solution + 2NH4HCO3Ionized aqueous solution + 3H2Un-ionized aqueous solution
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
420.6423.61544
210.3211.8772.0
per 1 mol of
52.5852.95193.0
per 1 mol of
420.6423.61544
per 1 mol of
210.3211.8772.0
210.3211.8772.0
per 1 mol of
140.2141.2514.7

Changes in aqueous solution (7)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
2NH4SCNIonized aqueous solution + 8H2OLiquid
💧⚡
NH4NO2Ionized aqueous solution + 2H2SUn-ionized aqueous solution + 2NH4HCO3Aqueous solution + 3H2Gas
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
438.8
219.4
per 1 mol of
54.85
per 1 mol of
438.8
per 1 mol of
219.4
219.4
per 1 mol of
146.3

Changes in aqueous solution (8)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
2NH4SCNIonized aqueous solution + 8H2OLiquid
💧⚡
NH4NO2Ionized aqueous solution + 2H2SUn-ionized aqueous solution + 2NH4HCO3Aqueous solution + 3H2Un-ionized aqueous solution
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
426.2
213.1
per 1 mol of
53.27
per 1 mol of
426.2
per 1 mol of
213.1
213.1
per 1 mol of
142.1

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
NH4SCN (cr)-78.7[1]
NH4SCN (ai)-56.07[1]13.40[1]257.7[1]39.7[1]
H2O (cr)
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
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
NH4NO2 (cr)-256.5[1]
NH4NO2 (ai)-237.2[1]-111.6[1]236.4[1]-17.6[1]
H2S (g)-20.63[1]-33.56[1]205.79[1]34.23[1]
H2S (ao)-39.7[1]-27.83[1]121[1]
NH4HCO3 (cr)-849.4[1]-665.9[1]120.9[1]
NH4HCO3 (ai)-824.50[1]-666.07[1]204.6[1]
NH4HCO3 (aq)-821.7[1]
H2 (g)0[1]0[1]130.684[1]28.824[1]
H2 (ao)-4.2[1]17.6[1]577[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution, (aq):Aqueous solution

References

List of references

  1. 1