FeI2 + H2SiO3 🔥→ FeSiO3 + 2HI↑
Last updated:
The reaction of iron(II) iodide and metasilicic acid yields iron(II) metasilicate and hydrogen iodide. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of iron(II) iodide and metasilicic acid
General equation
- Salt of volatile acidBrønsted base + Nonvolatile acidBrønsted acid ⟶ Salt of non volatile acidConjugate base + Volatile acidConjugate acid
Oxidation state of each atom
- Reaction of iron(II) iodide and metasilicic acid
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| FeI2 | Iron(II) iodide | 1 | Brønsted base | Salt of volatile acid |
| H2SiO3 | Metasilicic acid | 1 | Brønsted acid | Nonvolatile acid |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| FeSiO3 | Iron(II) metasilicate | 1 | Conjugate base | Salt of non volatile acid |
| HI | Hydrogen iodide | 2 | Conjugate acid | Volatile acid |
Thermodynamic changes
Changes in standard condition
- Reaction of iron(II) iodide and metasilicic acid
| 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 | 150 | – | – | – |
per 1 mol of | 150 | – | – | – |
per 1 mol of | 150 | – | – | – |
per 1 mol of | 150 | – | – | – |
per 1 mol of | 75.0 | – | – | – |
Changes in aqueous solution (1)
- Reaction of iron(II) iodide and metasilicic acid
| 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 | 230 | – | – | – |
per 1 mol of | 230 | – | – | – |
per 1 mol of | 230 | – | – | – |
per 1 mol of | 230 | – | – | – |
per 1 mol of | 115 | – | – | – |
Changes in aqueous solution (2)
- Reaction of iron(II) iodide and metasilicic acid
| 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 | 67 | – | – | – |
per 1 mol of | 67 | – | – | – |
per 1 mol of | 67 | – | – | – |
per 1 mol of | 67 | – | – | – |
per 1 mol of | 34 | – | – | – |
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 |
|---|---|---|---|---|
| FeI2 (cr) | -113.0[1] | – | – | – |
| FeI2 (g) | 60.7[1] | – | – | – |
| FeI2 (ai) | -199.6[1] | -182.05[1] | 84.9[1] | – |
| H2SiO3 (cr) | -1188.7[1] | -1092.4[1] | 134[1] | – |
| H2SiO3 (ao) | -1182.8[1] | -1079.4[1] | 109[1] | – |
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution
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 |
|---|---|---|---|---|
| FeSiO3 (cr) | -1205[1] | – | – | – |
| HI (g) | 26.48[1] | 1.70[1] | 206.594[1] | 29.158[1] |
| HI (ai) | -55.19[1] | -51.57[1] | 111.3[1] | -142.3[1] |
* (cr):Crystalline solid, (g):Gas, (ai):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°, -113.0 kJ · mol−1
- ^ ΔfH°, 60.7 kJ · mol−1
- ^ ΔfH°, -199.6 kJ · mol−1
- ^ ΔfG°, -182.05 kJ · mol−1
- ^ S°, 84.9 J · K−1 · mol−1
- ^ ΔfH°, -1188.7 kJ · mol−1
- ^ ΔfG°, -1092.4 kJ · mol−1
- ^ S°, 134. J · K−1 · mol−1
- ^ ΔfH°, -1182.8 kJ · mol−1
- ^ ΔfG°, -1079.4 kJ · mol−1
- ^ S°, 109. J · K−1 · mol−1
- ^ ΔfH°, -1205. kJ · mol−1
- ^ ΔfH°, 26.48 kJ · mol−1
- ^ ΔfG°, 1.70 kJ · mol−1
- ^ S°, 206.594 J · K−1 · mol−1
- ^ Cp°, 29.158 J · K−1 · mol−1
- ^ ΔfH°, -55.19 kJ · mol−1
- ^ ΔfG°, -51.57 kJ · mol−1
- ^ S°, 111.3 J · K−1 · mol−1
- ^ Cp°, -142.3 J · K−1 · mol−1