Hg(SCN)2 + 5Fe2O3 → HgO + 2S + N2↑ + 2FeCO3 + 8FeO
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- Reaction of mercury(II) thiocyanate and iron(III) oxide
The reaction of mercury(II) thiocyanate and iron(III) oxide yields mercury(II) oxide, , , iron(II) carbonate, and iron(II) 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 | 1 | Reducing | Reducing |
| Fe2O3 | Iron(III) oxide | 5 | Oxidizing | Reducible |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| HgO | Mercury(II) oxide | 1 | – | – |
| 2 | Oxidized | – | ||
| 1 | Oxidized | – | ||
| FeCO3 | Iron(II) carbonate | 2 | Reduced | – |
| FeO | Iron(II) oxide | 8 | Reduced | – |
Thermodynamic changes
Changes in aqueous solution
- Reaction of mercury(II) thiocyanate and iron(III) oxide
| 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 | 176.8 | – | – | – |
per 1 mol of | 176.8 | – | – | – |
per 1 mol of | 35.36 | – | – | – |
per 1 mol of | 176.8 | – | – | – |
| 88.40 | – | – | – | |
| 176.8 | – | – | – | |
per 1 mol of | 88.40 | – | – | – |
per 1 mol of | 22.10 | – | – | – |
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 |
|---|---|---|---|---|
| HgO (cr) red, orthorhombic | -90.83[1] | -58.539[1] | 70.29[1] | 44.06[1] |
| HgO (cr) yellow | -90.46[1] | -58.409[1] | 71.1[1] | – |
| HgO (cr) hexagonal | -89.5[1] | -58.22[1] | 73.6[1] | – |
| HgO (g) | – | – | 241.9[1] | 34.10[1] |
| (cr) rhombic | 0[1] | 0[1] | 31.80[1] | 22.64[1] |
| (cr) monoclinic | 0.33[1] | – | – | – |
| (g) | 278.805[1] | 238.250[1] | 167.821[1] | 23.673[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] |
| FeO (cr) | -272.0[1] | – | – | – |
* (cr):Crystalline solid, (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°, -90.83 kJ · mol−1
- ^ ΔfG°, -58.539 kJ · mol−1
- ^ S°, 70.29 J · K−1 · mol−1
- ^ Cp°, 44.06 J · K−1 · mol−1
- ^ ΔfH°, -90.46 kJ · mol−1
- ^ ΔfG°, -58.409 kJ · mol−1
- ^ S°, 71.1 J · K−1 · mol−1
- ^ ΔfH°, -89.5 kJ · mol−1
- ^ ΔfG°, -58.22 kJ · mol−1
- ^ S°, 73.6 J · K−1 · mol−1
- ^ S°, 241.9 J · K−1 · mol−1
- ^ Cp°, 34.10 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 31.80 J · K−1 · mol−1
- ^ Cp°, 22.64 J · K−1 · mol−1
- ^ ΔfH°, 0.33 kJ · mol−1
- ^ ΔfH°, 278.805 kJ · mol−1
- ^ ΔfG°, 238.250 kJ · mol−1
- ^ S°, 167.821 J · K−1 · mol−1
- ^ Cp°, 23.673 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°, -272.0 kJ · mol−1