3Hg(SCN)2 + 94Fe2O3 🔥→ 3HgSO4 + Fe2(SO4)3 + 3N2↑ + 6FeCO3 + 60Fe3O4
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The reaction of mercury(II) thiocyanate and iron(III) oxide yields mercury(II) sulfate, iron(III) sulfate, , iron(II) carbonate, and iron(II,III) oxide (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 mercury(II) thiocyanate and iron(III) oxide
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 mercury(II) thiocyanate and iron(III) oxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Hg(SCN)2 | Mercury(II) thiocyanate | 3 | Reducing | Reducing |
| Fe2O3 | Iron(III) oxide | 94 | Oxidizing | Reducible |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| HgSO4 | Mercury(II) sulfate | 3 | Oxidized | – |
| Fe2(SO4)3 | Iron(III) sulfate | 1 | Oxidized | – |
| 3 | Oxidized | – | ||
| FeCO3 | Iron(II) carbonate | 6 | Reduced | – |
| Fe3O4 | Iron(II,III) oxide | 60 | Reduced | – |
Thermodynamic changes
Changes in aqueous solution
- Reaction of mercury(II) thiocyanate and iron(III) oxide◆
ΔrG 80.9 kJ/mol K 0.67 × 10−14 pK 14.17
| 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 | – | 80.9 | – | – |
per 1 mol of | – | 27.0 | – | – |
per 1 mol of | – | 0.861 | – | – |
per 1 mol of | – | 27.0 | – | – |
per 1 mol of | – | 80.9 | – | – |
| – | 27.0 | – | – | |
per 1 mol of | – | 13.5 | – | – |
per 1 mol of | – | 1.35 | – | – |
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 |
|---|---|---|---|---|
| Hg(SCN)2 (ao) | 196.2[1] | 251.5[1] | 157.3[1] | – |
| Fe2O3 (cr) | -824.2[1] | -742.2[1] | 87.40[1] | 103.85[1] |
* (ao):Un-ionized aqueous solution, (cr):Crystalline solid
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 |
|---|---|---|---|---|
| HgSO4 (cr) | -707.5[1] | – | – | – |
| HgSO4 (ao) | – | -588.2[1] | – | – |
| Fe2(SO4)3 (cr) | -2581.5[1] | – | – | – |
| Fe2(SO4)3 (ai) | -2825.0[1] | -2242.8[1] | -571.5[1] | – |
| (g) | 0[1] | 0[1] | 191.61[1] | 29.125[1] |
| FeCO3 (cr) siderite | -740.57[1] | -666.67[1] | 92.9[1] | 82.13[1] |
| Fe3O4 (cr) | -1118.4[1] | -1015.4[1] | 146.4[1] | 143.43[1] |
* (cr):Crystalline solid, (ao):Un-ionized aqueous solution, (ai):Ionized aqueous solution, (g):Gas
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°, 196.2 kJ · mol−1
- ^ ΔfG°, 251.5 kJ · mol−1
- ^ S°, 157.3 J · K−1 · mol−1
- ^ ΔfH°, -824.2 kJ · mol−1
- ^ ΔfG°, -742.2 kJ · mol−1
- ^ S°, 87.40 J · K−1 · mol−1
- ^ Cp°, 103.85 J · K−1 · mol−1
- ^ ΔfH°, -707.5 kJ · mol−1
- ^ ΔfG°, -588.2 kJ · mol−1
- ^ ΔfH°, -2581.5 kJ · mol−1
- ^ ΔfH°, -2825.0 kJ · mol−1
- ^ ΔfG°, -2242.8 kJ · mol−1
- ^ S°, -571.5 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 191.61 J · K−1 · mol−1
- ^ Cp°, 29.125 J · K−1 · mol−1
- ^ ΔfH°, -740.57 kJ · mol−1
- ^ ΔfG°, -666.67 kJ · mol−1
- ^ S°, 92.9 J · K−1 · mol−1
- ^ Cp°, 82.13 J · K−1 · mol−1
- ^ ΔfH°, -1118.4 kJ · mol−1
- ^ ΔfG°, -1015.4 kJ · mol−1
- ^ S°, 146.4 J · K−1 · mol−1
- ^ Cp°, 143.43 J · K−1 · mol−1