FeSe + 2H2O → Fe(OH)2 + H2Se↑
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- Hydrolysis of iron(II) selenide
The reaction of iron(II) selenide and water yields iron(II) hydroxide and hydrogen selenide. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Hydrolysis of iron(II) selenide
General equation
- Hydrolysis of salt
- Salt of weak acid and weak baseBrønsted base + H2OBrønsted acid ⟶ Base/Basic saltConjugate base + Acid/Acid salt/HydrideConjugate acid
Oxidation state of each atom
- Hydrolysis of iron(II) selenide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| FeSe | Iron(II) selenide | 1 | Brønsted base | Salt of weak acid and weak base |
| H2O | Water | 2 | Brønsted acid | Water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Fe(OH)2 | Iron(II) hydroxide | 1 | Conjugate base | Base |
| H2Se | Hydrogen selenide | 1 | Conjugate acid | Acid |
Thermodynamic changes
Changes in standard condition (1)
- Hydrolysis of iron(II) selenide
| 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 | 107.7 | – | – | – |
per 1 mol of | 107.7 | – | – | – |
per 1 mol of | 53.85 | – | – | – |
per 1 mol of | 107.7 | – | – | – |
per 1 mol of | 107.7 | – | – | – |
Changes in standard condition (2)
- Hydrolysis of iron(II) selenide
| 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 | 96.0 | – | – | – |
per 1 mol of | 96.0 | – | – | – |
per 1 mol of | 48.0 | – | – | – |
per 1 mol of | 96.0 | – | – | – |
per 1 mol of | 96.0 | – | – | – |
Changes in aqueous solution (1)
- Hydrolysis of iron(II) selenide
| 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 | 107.7 | – | – | – |
per 1 mol of | 107.7 | – | – | – |
per 1 mol of | 53.85 | – | – | – |
per 1 mol of | 107.7 | – | – | – |
per 1 mol of | 107.7 | – | – | – |
Changes in aqueous solution (2)
- Hydrolysis of iron(II) selenide
| 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 | 97.2 | – | – | – |
per 1 mol of | 97.2 | – | – | – |
per 1 mol of | 48.6 | – | – | – |
per 1 mol of | 97.2 | – | – | – |
per 1 mol of | 97.2 | – | – | – |
Thermodynamic data of reactants
| Chemical formula | Standard 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 |
|---|---|---|---|---|
| FeSe (cr) | -75.3[1] | – | – | – |
| FeSe (am) | -63.6[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] |
* (cr):Crystalline solid, (am):Amorphous solid, (l):Liquid, (g):Gas
Thermodynamic data of products
| Chemical formula | Standard 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 |
|---|---|---|---|---|
| Fe(OH)2 (cr) precipitated | -569.0[1] | -486.5[1] | 88[1] | – |
| Fe(OH)2 (g) | -372[1] | – | – | – |
| H2Se (g) | 29.7[1] | 15.9[1] | 219.02[1] | 34.73[1] |
| H2Se (ao) | 19.2[1] | 22.2[1] | 163.6[1] | – |
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution
References
List of references
- 1Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- ^ ΔfH°, -75.3 kJ · mol−1
- ^ ΔfH°, -63.6 kJ · mol−1
- ^ ΔfH°, -285.830 kJ · mol−1
- ^ ΔfG°, -237.129 kJ · mol−1
- ^ S°, 69.91 J · K−1 · mol−1
- ^ Cp°, 75.291 J · K−1 · mol−1
- ^ ΔfH°, -241.818 kJ · mol−1
- ^ ΔfG°, -228.572 kJ · mol−1
- ^ S°, 188.825 J · K−1 · mol−1
- ^ Cp°, 33.577 J · K−1 · mol−1
- ^ ΔfH°, -569.0 kJ · mol−1
- ^ ΔfG°, -486.5 kJ · mol−1
- ^ S°, 88. J · K−1 · mol−1
- ^ ΔfH°, -372. kJ · mol−1
- ^ ΔfH°, 29.7 kJ · mol−1
- ^ ΔfG°, 15.9 kJ · mol−1
- ^ S°, 219.02 J · K−1 · mol−1
- ^ Cp°, 34.73 J · K−1 · mol−1
- ^ ΔfH°, 19.2 kJ · mol−1
- ^ ΔfG°, 22.2 kJ · mol−1
- ^ S°, 163.6 J · K−1 · mol−1