8Li + 5H2SiO3 → 4Li2SiO3 + SiH4 + 3H2O
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- Reaction of and metasilicic acid
The reaction of and metasilicic acid yields lithium metasilicate, , and water (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of and metasilicic acid
General equation
- Reaction of reducing species and reducible species
- Reducing speciesReducing agent + Reducible speciesOxidizing agent ⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Reaction of and metasilicic acid
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| 8 | Reducing | Reducing | ||
| H2SiO3 | Metasilicic acid | 5 | Oxidizing | Reducible |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Li2SiO3 | Lithium metasilicate | 4 | Oxidized | – |
| 1 | Reduced | – | ||
| H2O | Water | 3 | – | – |
Thermodynamic changes
Changes in aqueous solution
- Reaction of and metasilicic acid◆
ΔrG −1486.3 kJ/mol K 2.45 × 10260 pK −260.39
| 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 | −1501.6 | −1486.3 | −44 | – |
| −187.70 | −185.79 | −5.5 | – | |
per 1 mol of | −300.32 | −297.26 | −8.8 | – |
per 1 mol of | −375.40 | −371.57 | −11 | – |
| −1501.6 | −1486.3 | −44 | – | |
per 1 mol of | −500.53 | −495.43 | −15 | – |
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 |
|---|---|---|---|---|
| (cr) | 0[1] | 0[1] | 29.12[1] | 24.77[1] |
| (g) | 159.37[1] | 126.66[1] | 138.77[1] | 20.786[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, (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 |
|---|---|---|---|---|
| Li2SiO3 (cr) | -1648.1[1] | -1557.2[1] | 79.83[1] | 99.08[1] |
| Li2SiO3 (vit) | -1628[1] | – | – | – |
| (g) | 34.3[1] | 56.9[1] | 204.62[1] | 42.84[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, (vit):Vitreous liquid, (g):Gas, (l):Liquid
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°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 29.12 J · K−1 · mol−1
- ^ Cp°, 24.77 J · K−1 · mol−1
- ^ ΔfH°, 159.37 kJ · mol−1
- ^ ΔfG°, 126.66 kJ · mol−1
- ^ S°, 138.77 J · K−1 · mol−1
- ^ Cp°, 20.786 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°, -1648.1 kJ · mol−1
- ^ ΔfG°, -1557.2 kJ · mol−1
- ^ S°, 79.83 J · K−1 · mol−1
- ^ Cp°, 99.08 J · K−1 · mol−1
- ^ ΔfH°, -1628. kJ · mol−1
- ^ ΔfH°, 34.3 kJ · mol−1
- ^ ΔfG°, 56.9 kJ · mol−1
- ^ S°, 204.62 J · K−1 · mol−1
- ^ Cp°, 42.84 J · K−1 · 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