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NH4SCN + 3H2O ๐Ÿ’งโšกโ†’ NH4NO3 + S + CH4โ†‘ + H2โ†‘

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

Electrolysis of aqueous ammonium thiocyanate yields ammonium nitrate, sulfur, methane, 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 thiocyanate1
Self redox agent
Very soluble in water
H2OWater3
โ€“
Water

Products

Chemical formulaNameCoefficientTypeType in general
equation
NH4NO3Ammonium nitrate1
Oxidized
โ€“
SSulfur1
Oxidized
โ€“
CH4Methane1
Reduced
โ€“
H2Hydrogen1
โ€“
โ€“

Thermodynamic changes

Changes in standard condition (1)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNCrystalline solid + 3H2OLiquid
๐Ÿ’งโšก
โŸถ
NH4NO3Crystalline solid + SCrystalline solidrhombic + CH4โ†‘Gas + H2โ†‘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
495.8โ€“โ€“โ€“
495.8โ€“โ€“โ€“
per 1 mol of
165.3โ€“โ€“โ€“
per 1 mol of
495.8โ€“โ€“โ€“
per 1 mol of
495.8โ€“โ€“โ€“
per 1 mol of
495.8โ€“โ€“โ€“
per 1 mol of
495.8โ€“โ€“โ€“

Changes in standard condition (2)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
NH4SCNCrystalline solid + 3H2OLiquid
๐Ÿ’งโšก
โŸถ
NH4NO3Crystalline solid + SCrystalline solidmonoclinic + CH4โ†‘Gas + H2โ†‘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
496.2โ€“โ€“โ€“
496.2โ€“โ€“โ€“
per 1 mol of
165.4โ€“โ€“โ€“
per 1 mol of
496.2โ€“โ€“โ€“
per 1 mol of
496.2โ€“โ€“โ€“
per 1 mol of
496.2โ€“โ€“โ€“
per 1 mol of
496.2โ€“โ€“โ€“

Changes in aqueous solution (1)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
โ—†
ฮ”rG456.71 kJ/mol
K0.97 ร— 10โˆ’80
pK80.01
NH4SCNIonized aqueous solution + 3H2OLiquid
๐Ÿ’งโšก
โŸถ
NH4NO3Ionized aqueous solution + SCrystalline solidrhombic + CH4โ†‘Gas + H2โ†‘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
498.88456.71141.1โˆ’185.5
498.88456.71141.1โˆ’185.5
per 1 mol of
166.29152.2447.03โˆ’61.83
per 1 mol of
498.88456.71141.1โˆ’185.5
per 1 mol of
498.88456.71141.1โˆ’185.5
per 1 mol of
498.88456.71141.1โˆ’185.5
per 1 mol of
498.88456.71141.1โˆ’185.5

Changes in aqueous solution (2)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
โ—†
ฮ”rG474.3 kJ/mol
K0.81 ร— 10โˆ’83
pK83.09
NH4SCNIonized aqueous solution + 3H2OLiquid
๐Ÿ’งโšก
โŸถ
NH4NO3Ionized aqueous solution + SCrystalline solidrhombic + CH4โ†‘Gas + H2โ†‘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
494.7474.3587โ€“
494.7474.3587โ€“
per 1 mol of
164.9158.1196โ€“
per 1 mol of
494.7474.3587โ€“
per 1 mol of
494.7474.3587โ€“
per 1 mol of
494.7474.3587โ€“
per 1 mol of
494.7474.3587โ€“

Changes in aqueous solution (3)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
โ—†
ฮ”rG473.10 kJ/mol
K0.13 ร— 10โˆ’82
pK82.88
NH4SCNIonized aqueous solution + 3H2OLiquid
๐Ÿ’งโšก
โŸถ
NH4NO3Ionized aqueous solution + SCrystalline solidrhombic + CH4โ†‘Un-ionized aqueous solution + H2โ†‘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
484.65473.1038.6โ€“
484.65473.1038.6โ€“
per 1 mol of
161.55157.7012.9โ€“
per 1 mol of
484.65473.1038.6โ€“
per 1 mol of
484.65473.1038.6โ€“
per 1 mol of
484.65473.1038.6โ€“
per 1 mol of
484.65473.1038.6โ€“

Changes in aqueous solution (4)

Electrolysis of aqueous ammonium thiocyanate with water as non-redox agent
โ—†
ฮ”rG490.7 kJ/mol
K0.11 ร— 10โˆ’85
pK85.97
NH4SCNIonized aqueous solution + 3H2OLiquid
๐Ÿ’งโšก
โŸถ
NH4NO3Ionized aqueous solution + SCrystalline solidrhombic + CH4โ†‘Un-ionized aqueous solution + H2โ†‘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
480.5490.7485โ€“
480.5490.7485โ€“
per 1 mol of
160.2163.6162โ€“
per 1 mol of
480.5490.7485โ€“
per 1 mol of
480.5490.7485โ€“
per 1 mol of
480.5490.7485โ€“
per 1 mol of
480.5490.7485โ€“

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
NH4NO3 (cr)-365.56[1]-183.87[1]151.08[1]139.3[1]
NH4NO3 (ai)-339.87[1]-190.56[1]259.8[1]-6.7[1]
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]
CH4 (g)-74.81[1]-50.72[1]186.264[1]35.309[1]
CH4 (ao)-89.04[1]-34.33[1]83.7[1]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, (g):Gas, (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)