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2HSCN + 6H2O 💧⚡→ 2SO2↑ + NH4NO2 + 2CH4↑ + H2

Electrolysis of aqueous thiocyanic acid with water as non-redox agent

Electrolysis of aqueous thiocyanic acid yields sulfur dioxide, ammonium nitrite, 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 thiocyanic acid 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
💧⚡
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Electrolysis of aqueous thiocyanic acid with water as non-redox agent

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
HSCNThiocyanic acid2
Self redox agent
Miscible with water
H2OWater6
Water

Products

Chemical formulaNameCoefficientTypeType in general
equation
SO2Sulfur dioxide2
Oxidized
NH4NO2Ammonium nitrite1
Oxidized
CH4Methane2
Reduced
H2Hydrogen1

Thermodynamic changes

Changes in aqueous solution (1)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG423.9 kJ/mol
K0.54 × 10−74
pK74.26
2HSCNIonized aqueous solution + 6H2OLiquid
💧⚡
2SO2Gas + NH4NO2Ionized aqueous solution + 2CH4Gas + H2Gas
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
581.6423.9528.0−209.8
per 1 mol of
290.8211.9264.0−104.9
per 1 mol of
96.9370.6588.00−34.97
per 1 mol of
290.8211.9264.0−104.9
per 1 mol of
581.6423.9528.0−209.8
per 1 mol of
290.8211.9264.0−104.9
per 1 mol of
581.6423.9528.0−209.8

Changes in aqueous solution (2)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG441.5 kJ/mol
K0.45 × 10−77
pK77.35
2HSCNIonized aqueous solution + 6H2OLiquid
💧⚡
2SO2Gas + NH4NO2Ionized aqueous solution + 2CH4Gas + H2Un-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
577.4441.5974
per 1 mol of
288.7220.8487
per 1 mol of
96.2373.58162
per 1 mol of
288.7220.8487
per 1 mol of
577.4441.5974
per 1 mol of
288.7220.8487
per 1 mol of
577.4441.5974

Changes in aqueous solution (3)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG456.7 kJ/mol
K0.98 × 10−80
pK80.01
2HSCNIonized aqueous solution + 6H2OLiquid
💧⚡
2SO2Gas + NH4NO2Ionized aqueous solution + 2CH4Un-ionized aqueous solution + H2Gas
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
553.2456.7322.9
per 1 mol of
276.6228.3161.4
per 1 mol of
92.2076.1253.82
per 1 mol of
276.6228.3161.4
per 1 mol of
553.2456.7322.9
per 1 mol of
276.6228.3161.4
per 1 mol of
553.2456.7322.9

Changes in aqueous solution (4)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG474.3 kJ/mol
K0.81 × 10−83
pK83.09
2HSCNIonized aqueous solution + 6H2OLiquid
💧⚡
2SO2Gas + NH4NO2Ionized aqueous solution + 2CH4Un-ionized aqueous solution + H2Un-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
549.0474.3769
per 1 mol of
274.5237.2385
per 1 mol of
91.5079.05128
per 1 mol of
274.5237.2385
per 1 mol of
549.0474.3769
per 1 mol of
274.5237.2385
per 1 mol of
549.0474.3769

Changes in aqueous solution (5)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG423.0 kJ/mol
K0.78 × 10−74
pK74.11
2HSCNIonized aqueous solution + 6H2OLiquid
💧⚡
2SO2Un-ionized aqueous solution + NH4NO2Ionized aqueous solution + 2CH4Gas + H2Gas
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
529.3423.0355.4
per 1 mol of
264.6211.5177.7
per 1 mol of
88.2270.5059.23
per 1 mol of
264.6211.5177.7
per 1 mol of
529.3423.0355.4
per 1 mol of
264.6211.5177.7
per 1 mol of
529.3423.0355.4

Changes in aqueous solution (6)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG440.6 kJ/mol
K0.65 × 10−77
pK77.19
2HSCNIonized aqueous solution + 6H2OLiquid
💧⚡
2SO2Un-ionized aqueous solution + NH4NO2Ionized aqueous solution + 2CH4Gas + H2Un-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
525.1440.6802
per 1 mol of
262.6220.3401
per 1 mol of
87.5273.43134
per 1 mol of
262.6220.3401
per 1 mol of
525.1440.6802
per 1 mol of
262.6220.3401
per 1 mol of
525.1440.6802

Changes in aqueous solution (7)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG455.7 kJ/mol
K0.15 × 10−79
pK79.84
2HSCNIonized aqueous solution + 6H2OLiquid
💧⚡
2SO2Un-ionized aqueous solution + NH4NO2Ionized aqueous solution + 2CH4Un-ionized aqueous solution + H2Gas
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
500.9455.7150.2
per 1 mol of
250.4227.875.10
per 1 mol of
83.4875.9525.03
per 1 mol of
250.4227.875.10
per 1 mol of
500.9455.7150.2
per 1 mol of
250.4227.875.10
per 1 mol of
500.9455.7150.2

Changes in aqueous solution (8)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG473.3 kJ/mol
K0.12 × 10−82
pK82.92
2HSCNIonized aqueous solution + 6H2OLiquid
💧⚡
2SO2Un-ionized aqueous solution + NH4NO2Ionized aqueous solution + 2CH4Un-ionized aqueous solution + H2Un-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
496.7473.3597
per 1 mol of
248.3236.7299
per 1 mol of
82.7878.8899.5
per 1 mol of
248.3236.7299
per 1 mol of
496.7473.3597
per 1 mol of
248.3236.7299
per 1 mol of
496.7473.3597

Changes in aqueous solution (9)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG414.2 kJ/mol
K0.27 × 10−72
pK72.56
2HSCNUn-ionized aqueous solution + 6H2OLiquid
💧⚡
2SO2Gas + NH4NO2Ionized aqueous solution + 2CH4Gas + H2Gas
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
414.2
per 1 mol of
207.1
per 1 mol of
69.03
per 1 mol of
207.1
per 1 mol of
414.2
per 1 mol of
207.1
per 1 mol of
414.2

Changes in aqueous solution (10)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG431.8 kJ/mol
K0.22 × 10−75
pK75.65
2HSCNUn-ionized aqueous solution + 6H2OLiquid
💧⚡
2SO2Gas + NH4NO2Ionized aqueous solution + 2CH4Gas + H2Un-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
431.8
per 1 mol of
215.9
per 1 mol of
71.97
per 1 mol of
215.9
per 1 mol of
431.8
per 1 mol of
215.9
per 1 mol of
431.8

Changes in aqueous solution (11)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG447.0 kJ/mol
K0.49 × 10−78
pK78.31
2HSCNUn-ionized aqueous solution + 6H2OLiquid
💧⚡
2SO2Gas + NH4NO2Ionized aqueous solution + 2CH4Un-ionized aqueous solution + H2Gas
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
447.0
per 1 mol of
223.5
per 1 mol of
74.50
per 1 mol of
223.5
per 1 mol of
447.0
per 1 mol of
223.5
per 1 mol of
447.0

Changes in aqueous solution (12)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG464.6 kJ/mol
K0.40 × 10−81
pK81.39
2HSCNUn-ionized aqueous solution + 6H2OLiquid
💧⚡
2SO2Gas + NH4NO2Ionized aqueous solution + 2CH4Un-ionized aqueous solution + H2Un-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
464.6
per 1 mol of
232.3
per 1 mol of
77.43
per 1 mol of
232.3
per 1 mol of
464.6
per 1 mol of
232.3
per 1 mol of
464.6

Changes in aqueous solution (13)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG413.3 kJ/mol
K0.39 × 10−72
pK72.41
2HSCNUn-ionized aqueous solution + 6H2OLiquid
💧⚡
2SO2Un-ionized aqueous solution + NH4NO2Ionized aqueous solution + 2CH4Gas + H2Gas
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
413.3
per 1 mol of
206.7
per 1 mol of
68.88
per 1 mol of
206.7
per 1 mol of
413.3
per 1 mol of
206.7
per 1 mol of
413.3

Changes in aqueous solution (14)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG430.9 kJ/mol
K0.32 × 10−75
pK75.49
2HSCNUn-ionized aqueous solution + 6H2OLiquid
💧⚡
2SO2Un-ionized aqueous solution + NH4NO2Ionized aqueous solution + 2CH4Gas + H2Un-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
430.9
per 1 mol of
215.4
per 1 mol of
71.82
per 1 mol of
215.4
per 1 mol of
430.9
per 1 mol of
215.4
per 1 mol of
430.9

Changes in aqueous solution (15)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG446.0 kJ/mol
K0.73 × 10−78
pK78.14
2HSCNUn-ionized aqueous solution + 6H2OLiquid
💧⚡
2SO2Un-ionized aqueous solution + NH4NO2Ionized aqueous solution + 2CH4Un-ionized aqueous solution + H2Gas
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
446.0
per 1 mol of
223.0
per 1 mol of
74.33
per 1 mol of
223.0
per 1 mol of
446.0
per 1 mol of
223.0
per 1 mol of
446.0

Changes in aqueous solution (16)

Electrolysis of aqueous thiocyanic acid with water as non-redox agent
ΔrG463.6 kJ/mol
K0.60 × 10−81
pK81.22
2HSCNUn-ionized aqueous solution + 6H2OLiquid
💧⚡
2SO2Un-ionized aqueous solution + NH4NO2Ionized aqueous solution + 2CH4Un-ionized aqueous solution + H2Un-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
463.6
per 1 mol of
231.8
per 1 mol of
77.27
per 1 mol of
231.8
per 1 mol of
463.6
per 1 mol of
231.8
per 1 mol of
463.6

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
SO2 (l)-320.5[1]
SO2 (g)-296.830[1]-300.194[1]248.22[1]39.87[1]
SO2 (ao)-322.980[1]-300.676[1]161.9[1]
NH4NO2 (cr)-256.5[1]
NH4NO2 (ai)-237.2[1]-111.6[1]236.4[1]-17.6[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]
H2 (g)0[1]0[1]130.684[1]28.824[1]
H2 (ao)-4.2[1]17.6[1]577[1]
* (l):Liquid, (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (ai):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)