6Na4[Fe(CN)6] + 51MnO2 🔥→ 4Na3[Fe(CN)6] + 12NaNO3 + Fe2O3 + 51MnO + 12CO↑
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The reaction of sodium hexacyanidoferrate(II) and manganese(IV) oxide yields sodium hexacyanidoferrate(III), sodium nitrate, iron(III) oxide, manganese(II) 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 | 51 | Oxidizing | Reducible |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na3[Fe(CN)6] | Sodium hexacyanidoferrate(III) | 4 | Oxidized | – |
| NaNO3 | Sodium nitrate | 12 | Oxidized | – |
| Fe2O3 | Iron(III) oxide | 1 | Oxidized | – |
| MnO | Manganese(II) oxide | 51 | Reduced | – |
| CO | Carbon monoxide | 12 | – | – |
Thermodynamic changes
Changes in aqueous solution (1)
- Reaction of sodium hexacyanidoferrate(II) and manganese(IV) oxide◆
ΔrG 237.8 kJ/mol K 0.22 × 10−41 pK 41.66 - 6Na4[Fe(CN)6]Ionized aqueous solution + 51MnO2Crystalline solid4Na3[Fe(CN)6]Ionized aqueous solution + 12NaNO3Ionized aqueous solution + Fe2O3Crystalline solid + 51MnOCrystalline 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 | 1750.6 | 237.8 | 5067.1 | – |
per 1 mol of | 291.77 | 39.63 | 844.52 | – |
per 1 mol of | 34.325 | 4.663 | 99.355 | – |
per 1 mol of | 437.65 | 59.45 | 1266.8 | – |
per 1 mol of | 145.88 | 19.82 | 422.26 | – |
per 1 mol of | 1750.6 | 237.8 | 5067.1 | – |
per 1 mol of | 34.325 | 4.663 | 99.355 | – |
per 1 mol of | 145.88 | 19.82 | 422.26 | – |
Changes in aqueous solution (2)
- Reaction of sodium hexacyanidoferrate(II) and manganese(IV) oxide◆
ΔrG 445.0 kJ/mol K 0.11 × 10−77 pK 77.96 - 6Na4[Fe(CN)6]Ionized aqueous solution + 51MnO2Crystalline solid4Na3[Fe(CN)6]Ionized aqueous solution + 12NaNO3Ionized aqueous solution + Fe2O3Crystalline solid + 51MnOCrystalline 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 | 1625.4 | 445.0 | 3950.3 | – |
per 1 mol of | 270.90 | 74.17 | 658.38 | – |
per 1 mol of | 31.871 | 8.725 | 77.457 | – |
per 1 mol of | 406.35 | 111.3 | 987.58 | – |
per 1 mol of | 135.45 | 37.08 | 329.19 | – |
per 1 mol of | 1625.4 | 445.0 | 3950.3 | – |
per 1 mol of | 31.871 | 8.725 | 77.457 | – |
per 1 mol of | 135.45 | 37.08 | 329.19 | – |
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] | – |
| NaNO3 (cr) | -467.85[1] | -367.00[1] | 116.52[1] | 92.88[1] |
| NaNO3 (ai) | -447.48[1] | -373.15[1] | 205.4[1] | -40.2[1] |
| Fe2O3 (cr) | -824.2[1] | -742.2[1] | 87.40[1] | 103.85[1] |
| MnO (cr) | -385.22[1] | -362.90[1] | 59.71[1] | 45.44[1] |
| MnO (g) | 124.22[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°, -467.85 kJ · mol−1
- ^ ΔfG°, -367.00 kJ · mol−1
- ^ S°, 116.52 J · K−1 · mol−1
- ^ Cp°, 92.88 J · K−1 · mol−1
- ^ ΔfH°, -447.48 kJ · mol−1
- ^ ΔfG°, -373.15 kJ · mol−1
- ^ S°, 205.4 J · K−1 · mol−1
- ^ Cp°, -40.2 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°, -385.22 kJ · mol−1
- ^ ΔfG°, -362.90 kJ · mol−1
- ^ S°, 59.71 J · K−1 · mol−1
- ^ Cp°, 45.44 J · K−1 · mol−1
- ^ ΔfH°, 124.22 kJ · 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