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K2SO4 + H2S 🔥→ KHSO4 + KHS

The reaction of potassium sulfate and hydrogen sulfide yields potassium hydrogensulfate and potassium hydrogensulfide (Other reactions are here). This reaction is an acid-base 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 salt and acid with generating acid salt
SaltBrønsted base + AcidBrønsted acid
Acid saltConjugate acid base

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
K2SO4Potassium sulfate1
Brønsted base
Salt
H2SHydrogen sulfide1
Brønsted acid
Acid

Products

Chemical formulaNameCoefficientTypeType in general
equation
KHSO4Potassium hydrogensulfate1
Conjugate acid base
Acid salt
KHSPotassium hydrogensulfide1
Conjugate acid base
Acid salt

Thermodynamic changes

Changes in standard condition

Reaction of potassium sulfate and hydrogen sulfide
K2SO4Crystalline solid + H2SGas
🔥
KHSO4Crystalline solid + KHSCrystalline solid
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
32.7
per 1 mol of
32.7
per 1 mol of
32.7
32.7
32.7

Changes in aqueous solution

Reaction of potassium sulfate and hydrogen sulfide
ΔrG28.53 kJ/mol
K0.10 × 10−4
pK5.00
K2SO4Ionized aqueous solution + H2SUn-ionized aqueous solution
🔥
KHSO4Ionized aqueous solution + KHSIonized 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
44.128.5354
per 1 mol of
44.128.5354
per 1 mol of
44.128.5354
44.128.5354
44.128.5354

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
K2SO4 (cr)-1437.79[1]-1321.37[1]175.56[1]131.46[1]
K2SO4 (g)-1096[1]-1033[1]364[1]108.8[1]
K2SO4 (ai)-1414.02[1]-1311.07[1]225.1[1]-251[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]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution

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
KHSO4 (cr)-1160.6[1]-1031.3[1]138.1[1]
KHSO4 (ai)-1139.72[1]-1039.18[1]234.3[1]-63[1]
KHS (cr)-265.10[1]75.31[1]
KHS (ai)-269.9[1]-271.19[1]165.3[1]
KHS (cr)
0.25 hydrate
-337.2[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution

References

List of references

  1. 1