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3H2S + 4NaHCO3 ๐Ÿ”ฅโ†’ Na2SO4 + 2NaHS + 4CO + 4H2O

The reaction of hydrogen sulfide and sodium hydrogencarbonate yields sodium sulfate, sodium hydrogensulfide, carbon monoxide, and water (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

Reaction of reducing species and reducible species
Reducing speciesReducing agent + Reducible speciesOxidizing agent
โŸถ
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
H2SHydrogen sulfide3
Reducing
Reducing
NaHCO3Sodium hydrogencarbonate4
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
Na2SO4Sodium sulfate1
Oxidized
โ€“
NaHSSodium hydrogensulfide2
โ€“
โ€“
COCarbon monoxide4
Reduced
โ€“
H2OWater4
โ€“
โ€“

Thermodynamic changes

Changes in standard condition (1)

Reaction of hydrogen sulfide and sodium hydrogencarbonate
3H2SGas + 4NaHCO3Crystalline solid
๐Ÿ”ฅ
โŸถ
Na2SO4Crystalline solidorthorhombic + 2NaHSCrystalline solid + 4COGas + 4H2OLiquid
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
418.17โ€“โ€“โ€“
per 1 mol of
139.39โ€“โ€“โ€“
104.54โ€“โ€“โ€“
per 1 mol of
418.17โ€“โ€“โ€“
209.09โ€“โ€“โ€“
per 1 mol of
104.54โ€“โ€“โ€“
per 1 mol of
104.54โ€“โ€“โ€“

Changes in standard condition (2)

Reaction of hydrogen sulfide and sodium hydrogencarbonate
3H2SGas + 4NaHCO3Crystalline solid
๐Ÿ”ฅ
โŸถ
Na2SO4Crystalline solidmetastable + 2NaHSCrystalline solid + 4COGas + 4H2OLiquid
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€“
per 1 mol of
โ€“โ€“โ€“โ€“
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 (1)

Reaction of hydrogen sulfide and sodium hydrogencarbonate
โ—†
ฮ”rG212.96 kJ/mol
K0.49 ร— 10โˆ’37
pK37.31
3H2SUn-ionized aqueous solution + 4NaHCO3Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
Na2SO4Ionized aqueous solution + 2NaHSIonized aqueous solution + 4COGas + 4H2OLiquid
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
357.2212.96488โ€“
per 1 mol of
119.170.987163โ€“
89.3053.240122โ€“
per 1 mol of
357.2212.96488โ€“
178.6106.48244โ€“
per 1 mol of
89.3053.240122โ€“
per 1 mol of
89.3053.240122โ€“

Changes in aqueous solution (2)

Reaction of hydrogen sulfide and sodium hydrogencarbonate
โ—†
ฮ”rG282.03 kJ/mol
K0.39 ร— 10โˆ’49
pK49.41
3H2SUn-ionized aqueous solution + 4NaHCO3Ionized aqueous solution
๐Ÿ”ฅ
โŸถ
Na2SO4Ionized aqueous solution + 2NaHSIonized aqueous solution + 4COUn-ionized aqueous solution + 4H2OLiquid
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
315.4282.03116โ€“
per 1 mol of
105.194.01038.7โ€“
78.8570.50729.0โ€“
per 1 mol of
315.4282.03116โ€“
157.7141.0158.0โ€“
per 1 mol of
78.8570.50729.0โ€“
per 1 mol of
78.8570.50729.0โ€“

Changes in aqueous solution (3)

Reaction of hydrogen sulfide and sodium hydrogencarbonate
โ—†
ฮ”rG217.1 kJ/mol
K0.92 ร— 10โˆ’38
pK38.03
3H2SUn-ionized aqueous solution + 4NaHCO3Un-ionized aqueous solution
๐Ÿ”ฅ
โŸถ
Na2SO4Ionized aqueous solution + 2NaHSIonized aqueous solution + 4COGas + 4H2OLiquid
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
404.3217.1634โ€“
per 1 mol of
134.872.37211โ€“
101.154.27159โ€“
per 1 mol of
404.3217.1634โ€“
202.2108.5317โ€“
per 1 mol of
101.154.27159โ€“
per 1 mol of
101.154.27159โ€“

Changes in aqueous solution (4)

Reaction of hydrogen sulfide and sodium hydrogencarbonate
โ—†
ฮ”rG286.2 kJ/mol
K0.72 ร— 10โˆ’50
pK50.14
3H2SUn-ionized aqueous solution + 4NaHCO3Un-ionized aqueous solution
๐Ÿ”ฅ
โŸถ
Na2SO4Ionized aqueous solution + 2NaHSIonized aqueous solution + 4COUn-ionized aqueous solution + 4H2OLiquid
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
362.6286.2262โ€“
per 1 mol of
120.995.4087.3โ€“
90.6571.5565.5โ€“
per 1 mol of
362.6286.2262โ€“
181.3143.1131โ€“
per 1 mol of
90.6571.5565.5โ€“
per 1 mol of
90.6571.5565.5โ€“

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
H2S (g)-20.63[1]-33.56[1]205.79[1]34.23[1]
H2S (ao)-39.7[1]-27.83[1]121[1]โ€“
NaHCO3 (cr)-950.81[1]-851.0[1]101.7[1]87.61[1]
NaHCO3 (ai)-932.11[1]-848.66[1]150.2[1]โ€“
NaHCO3 (ao)-943.9[1]-849.7[1]113.8[1]โ€“
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (ai):Ionized aqueous solution

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
Na2SO4 (cr)
orthorhombic
-1387.08[1]-1270.16[1]149.58[1]128.20[1]
Na2SO4 (cr)
metastable
โ€“โ€“154.934[1]129.29[1]
Na2SO4 (ai)-1389.51[1]-1268.36[1]138.1[1]-201[1]
Na2SO4 (cr)
10 hydrate
-4327.26[1]-3646.85[1]592.0[1]โ€“
NaHS (cr)-237.23[1]โ€“โ€“โ€“
NaHS (ai)-257.73[1]-249.81[1]121.8[1]โ€“
NaHS (cr)
2 hydrate
-838.47[1]โ€“โ€“โ€“
CO (g)-110.525[1]-137.168[1]197.674[1]29.142[1]
CO (ao)-120.96[1]-119.90[1]104.6[1]โ€“
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, (g):Gas, (ao):Un-ionized aqueous solution, (l):Liquid

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)