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2HSCN + 13H2O 💧⚡→ 2SO3 + NH4NO3 + 2CO2↑ + 12H2

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent

Electrolysis of aqueous thiocyanic acid yields sulfur trioxide, ammonium nitrate, carbon dioxide, 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 thiocyanic acid with water as oxidizing agent

General equation

Electrolysis of aqueous solution with water as oxidizing agent
Miscible with water/Very soluble in water/Soluble in waterReducing agent + H2OOxidizing agent
💧⚡
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
HSCNThiocyanic acid2
Reducing
Miscible with water
H2OWater13
Oxidizing
Water

Products

Chemical formulaNameCoefficientTypeType in general
equation
SO3Sulfur trioxide2
Oxidized
NH4NO3Ammonium nitrate1
Oxidized
CO2Carbon dioxide2
H2Hydrogen12
Reduced

Thermodynamic changes

Changes in aqueous solution (1)

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent
ΔrG1169.56 kJ/mol
K0.13 × 10−204
pK204.90
2HSCNIonized aqueous solution + 13H2OLiquid
💧⚡
2SO3Crystalline solidβ + NH4NO3Ionized aqueous solution + 2CO2Gas + 12H2Gas
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
1527.001169.561199.5
per 1 mol of
763.500584.780599.75
per 1 mol of
117.46289.966292.269
per 1 mol of
763.500584.780599.75
per 1 mol of
1527.001169.561199.5
per 1 mol of
763.500584.780599.75
per 1 mol of
127.25097.463399.958

Changes in aqueous solution (2)

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent
ΔrG1380.8 kJ/mol
K0.12 × 10−241
pK241.91
2HSCNIonized aqueous solution + 13H2OLiquid
💧⚡
2SO3Crystalline solidβ + NH4NO3Ionized aqueous solution + 2CO2Gas + 12H2Un-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
1476.61380.86555
per 1 mol of
738.30690.403278
per 1 mol of
113.58106.22504.2
per 1 mol of
738.30690.403278
per 1 mol of
1476.61380.86555
per 1 mol of
738.30690.403278
per 1 mol of
123.05115.07546.3

Changes in aqueous solution (3)

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent
ΔrG1186.32 kJ/mol
K0.15 × 10−207
pK207.83
2HSCNIonized aqueous solution + 13H2OLiquid
💧⚡
2SO3Crystalline solidβ + NH4NO3Ionized aqueous solution + 2CO2Un-ionized aqueous solution + 12H2Gas
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
1486.421186.321007.2
per 1 mol of
743.210593.160503.60
per 1 mol of
114.34091.255477.477
per 1 mol of
743.210593.160503.60
per 1 mol of
1486.421186.321007.2
per 1 mol of
743.210593.160503.60
per 1 mol of
123.86898.860083.933

Changes in aqueous solution (4)

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent
ΔrG1397.5 kJ/mol
K0.15 × 10−244
pK244.83
2HSCNIonized aqueous solution + 13H2OLiquid
💧⚡
2SO3Crystalline solidβ + NH4NO3Ionized aqueous solution + 2CO2Un-ionized aqueous solution + 12H2Un-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
1436.01397.56363
per 1 mol of
718.00698.753182
per 1 mol of
110.46107.50489.5
per 1 mol of
718.00698.753182
per 1 mol of
1436.01397.56363
per 1 mol of
718.00698.753182
per 1 mol of
119.67116.46530.3

Changes in aqueous solution (5)

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent
ΔrG1159.86 kJ/mol
K0.63 × 10−203
pK203.20
2HSCNUn-ionized aqueous solution + 13H2OLiquid
💧⚡
2SO3Crystalline solidβ + NH4NO3Ionized aqueous solution + 2CO2Gas + 12H2Gas
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
1159.86
per 1 mol of
579.930
per 1 mol of
89.2200
per 1 mol of
579.930
per 1 mol of
1159.86
per 1 mol of
579.930
per 1 mol of
96.6550

Changes in aqueous solution (6)

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent
ΔrG1371.1 kJ/mol
K0.62 × 10−240
pK240.21
2HSCNUn-ionized aqueous solution + 13H2OLiquid
💧⚡
2SO3Crystalline solidβ + NH4NO3Ionized aqueous solution + 2CO2Gas + 12H2Un-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
1371.1
per 1 mol of
685.55
per 1 mol of
105.47
per 1 mol of
685.55
per 1 mol of
1371.1
per 1 mol of
685.55
per 1 mol of
114.26

Changes in aqueous solution (7)

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent
ΔrG1176.62 kJ/mol
K0.73 × 10−206
pK206.13
2HSCNUn-ionized aqueous solution + 13H2OLiquid
💧⚡
2SO3Crystalline solidβ + NH4NO3Ionized aqueous solution + 2CO2Un-ionized aqueous solution + 12H2Gas
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
1176.62
per 1 mol of
588.310
per 1 mol of
90.5092
per 1 mol of
588.310
per 1 mol of
1176.62
per 1 mol of
588.310
per 1 mol of
98.0517

Changes in aqueous solution (8)

Electrolysis of aqueous thiocyanic acid with water as oxidizing agent
ΔrG1387.8 kJ/mol
K0.74 × 10−243
pK243.13
2HSCNUn-ionized aqueous solution + 13H2OLiquid
💧⚡
2SO3Crystalline solidβ + NH4NO3Ionized aqueous solution + 2CO2Un-ionized aqueous solution + 12H2Un-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
1387.8
per 1 mol of
693.90
per 1 mol of
106.75
per 1 mol of
693.90
per 1 mol of
1387.8
per 1 mol of
693.90
per 1 mol of
115.65

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
HSCN (ai)76.44[1]92.71[1]144.3[1]-40.2[1]
HSCN (ao)97.56[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]
* (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (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
SO3 (cr)
β
-454.51[1]-374.21[1]70.7[1]
SO3 (l)-441.04[1]-373.75[1]113.8[1]
SO3 (g)-395.72[1]-371.06[1]256.76[1]50.67[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]
CO2 (g)-393.509[1]-394.359[1]213.74[1]37.11[1]
CO2 (ao)-413.80[1]-385.98[1]117.6[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, (l):Liquid, (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)