6Na4[Fe(CN)6] + 78MnO2 → 4Na3[Fe(CN)6] + 12NaNO2 + Fe2O3 + 39Mn2O3 + 12CO↑
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The reaction of sodium hexacyanidoferrate(II) and manganese(IV) oxide yields sodium hexacyanidoferrate(III), sodium nitrite, iron(III) oxide, manganese(III) oxide, and carbon monoxide (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 sodium hexacyanidoferrate(II) and manganese(IV) 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 sodium hexacyanidoferrate(II) and manganese(IV) oxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na4[Fe(CN)6] | Sodium hexacyanidoferrate(II) | 6 | Reducing | Reducing |
| MnO2 | Manganese(IV) oxide | 78 | Oxidizing | Reducible |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na3[Fe(CN)6] | Sodium hexacyanidoferrate(III) | 4 | Oxidized | – |
| NaNO2 | Sodium nitrite | 12 | Oxidized | – |
| Fe2O3 | Iron(III) oxide | 1 | Oxidized | – |
| Mn2O3 | Manganese(III) oxide | 39 | Reduced | – |
| CO | Carbon monoxide | 12 | – | – |
Thermodynamic changes
Changes in aqueous solution (1)
- Reaction of sodium hexacyanidoferrate(II) and manganese(IV) oxide◆
ΔrG −2109.8 kJ/mol K 4.18 × 10369 pK −369.62 - 6Na4[Fe(CN)6]Ionized aqueous solution + 78MnO2Crystalline solid4Na3[Fe(CN)6]Ionized aqueous solution + 12NaNO2Ionized aqueous solution + Fe2O3Crystalline solid + 39Mn2O3Crystalline solid + 12CO↑Gas⟶
| 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 | −731.2 | −2109.8 | 4618.3 | – |
per 1 mol of | −121.9 | −351.63 | 769.72 | – |
per 1 mol of | −9.374 | −27.049 | 59.209 | – |
per 1 mol of | −182.8 | −527.45 | 1154.6 | – |
per 1 mol of | −60.93 | −175.82 | 384.86 | – |
per 1 mol of | −731.2 | −2109.8 | 4618.3 | – |
per 1 mol of | −18.75 | −54.097 | 118.42 | – |
per 1 mol of | −60.93 | −175.82 | 384.86 | – |
Changes in aqueous solution (2)
- Reaction of sodium hexacyanidoferrate(II) and manganese(IV) oxide◆
ΔrG −1902.6 kJ/mol K 2.09 × 10333 pK −333.32 - 6Na4[Fe(CN)6]Ionized aqueous solution + 78MnO2Crystalline solid4Na3[Fe(CN)6]Ionized aqueous solution + 12NaNO2Ionized aqueous solution + Fe2O3Crystalline solid + 39Mn2O3Crystalline solid + 12CO↑Un-ionized aqueous solution⟶
| 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 | −856.4 | −1902.6 | 3501.4 | – |
per 1 mol of | −142.7 | −317.10 | 583.57 | – |
per 1 mol of | −10.98 | −24.392 | 44.890 | – |
per 1 mol of | −214.1 | −475.65 | 875.35 | – |
per 1 mol of | −71.37 | −158.55 | 291.78 | – |
per 1 mol of | −856.4 | −1902.6 | 3501.4 | – |
per 1 mol of | −21.96 | −48.785 | 89.779 | – |
per 1 mol of | −71.37 | −158.55 | 291.78 | – |
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 |
|---|---|---|---|---|
| Na4[Fe(CN)6] (ai) | -505.0[1] | -352.53[1] | 331.0[1] | – |
| MnO2 (cr) | -520.03[1] | -465.14[1] | 53.05[1] | 54.14[1] |
| MnO2 (am) precipitated | -502.5[1] | – | – | – |
* (ai):Ionized aqueous solution, (cr):Crystalline solid, (am):Amorphous 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 |
|---|---|---|---|---|
| Na3[Fe(CN)6] (ai) | -158.6[1] | -56.4[1] | 447.3[1] | – |
| NaNO2 (cr) | -358.65[1] | -284.55[1] | 103.8[1] | – |
| NaNO2 (ai) | -344.8[1] | -294.1[1] | 182.0[1] | -51.0[1] |
| Fe2O3 (cr) | -824.2[1] | -742.2[1] | 87.40[1] | 103.85[1] |
| Mn2O3 (cr) | -959.0[1] | -881.1[1] | 110.5[1] | 107.65[1] |
| CO (g) | -110.525[1] | -137.168[1] | 197.674[1] | 29.142[1] |
| CO (ao) | -120.96[1] | -119.90[1] | 104.6[1] | – |
* (ai):Ionized aqueous solution, (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°, -505.0 kJ · mol−1
- ^ ΔfG°, -352.53 kJ · mol−1
- ^ S°, 331.0 J · K−1 · mol−1
- ^ ΔfH°, -520.03 kJ · mol−1
- ^ ΔfG°, -465.14 kJ · mol−1
- ^ S°, 53.05 J · K−1 · mol−1
- ^ Cp°, 54.14 J · K−1 · mol−1
- ^ ΔfH°, -502.5 kJ · mol−1
- ^ ΔfH°, -158.6 kJ · mol−1
- ^ ΔfG°, -56.4 kJ · mol−1
- ^ S°, 447.3 J · K−1 · mol−1
- ^ ΔfH°, -358.65 kJ · mol−1
- ^ ΔfG°, -284.55 kJ · mol−1
- ^ S°, 103.8 J · K−1 · mol−1
- ^ ΔfH°, -344.8 kJ · mol−1
- ^ ΔfG°, -294.1 kJ · mol−1
- ^ S°, 182.0 J · K−1 · mol−1
- ^ Cp°, -51.0 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°, -959.0 kJ · mol−1
- ^ ΔfG°, -881.1 kJ · mol−1
- ^ S°, 110.5 J · K−1 · mol−1
- ^ Cp°, 107.65 J · K−1 · mol−1
- ^ ΔfH°, -110.525 kJ · mol−1
- ^ ΔfG°, -137.168 kJ · mol−1
- ^ S°, 197.674 J · K−1 · mol−1
- ^ Cp°, 29.142 J · K−1 · mol−1
- ^ ΔfH°, -120.96 kJ · mol−1
- ^ ΔfG°, -119.90 kJ · mol−1
- ^ S°, 104.6 J · K−1 · mol−1