3H2 + Na4[Fe(CN)6] → Fe + 4NaCN + 2NH3 + 2C
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- Reaction of and sodium hexacyanidoferrate(II)
The reaction of and sodium hexacyanidoferrate(II) yields , sodium cyanide, ammonia, and (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 sodium hexacyanidoferrate(II)
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 sodium hexacyanidoferrate(II)
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| 3 | Reducing | Reducing | ||
| Na4[Fe(CN)6] | Sodium hexacyanidoferrate(II) | 1 | Oxidizing | Reducible |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| 1 | Reduced | – | ||
| NaCN | Sodium cyanide | 4 | – | – |
| NH3 | Ammonia | 2 | Oxidized | – |
| 2 | Reduced | – |
Thermodynamic changes
Changes in aqueous solution (1)
- Reaction of and sodium hexacyanidoferrate(II)◆
ΔrG −91.2 kJ/mol K 9.50 × 1015 pK −15.98 - 3Un-ionized aqueous solution + Na4[Fe(CN)6]Ionized aqueous solutionCrystalline solid + 4NaCNIonized aqueous solution + 2NH3Gas + 2Crystalline solidgraphite⟶
| 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 | 67.4 | −91.2 | −1026 | – |
| 22.5 | −30.4 | −342.0 | – | |
per 1 mol of | 67.4 | −91.2 | −1026 | – |
| 67.4 | −91.2 | −1026 | – | |
per 1 mol of | 16.9 | −22.8 | −256.5 | – |
per 1 mol of | 33.7 | −45.6 | −513.0 | – |
| 33.7 | −45.6 | −513.0 | – |
Changes in aqueous solution (2)
- Reaction of and sodium hexacyanidoferrate(II)◆
ΔrG −111.3 kJ/mol K 3.15 × 1019 pK −19.50 - 3Un-ionized aqueous solution + Na4[Fe(CN)6]Ionized aqueous solutionCrystalline solid + 4NaCNIonized aqueous solution + 2NH3Un-ionized aqueous solution + 2Crystalline solidgraphite⟶
| 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 | −1.0 | −111.3 | −1188 | – |
| −0.33 | −37.10 | −396.0 | – | |
per 1 mol of | −1.0 | −111.3 | −1188 | – |
| −1.0 | −111.3 | −1188 | – | |
per 1 mol of | −0.25 | −27.82 | −297.0 | – |
per 1 mol of | −0.50 | −55.65 | −594.0 | – |
| −0.50 | −55.65 | −594.0 | – |
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 |
|---|---|---|---|---|
| (g) | 0[1] | 0[1] | 130.684[1] | 28.824[1] |
| (ao) | -4.2[1] | 17.6[1] | 577[1] | – |
| Na4[Fe(CN)6] (ai) | -505.0[1] | -352.53[1] | 331.0[1] | – |
* (g):Gas, (ao):Un-ionized aqueous solution, (ai):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 |
|---|---|---|---|---|
| (cr) | 0[1] | 0[1] | 27.28[1] | 25.10[1] |
| (g) | 416.3[1] | 370.7[1] | 180.490[1] | 25.677[1] |
| NaCN (cr) cubic | -87.49[1] | -76.43[1] | 115.60[1] | 70.37[1] |
| NaCN (cr) orthorhombic | -90.75[1] | – | – | – |
| NaCN (g) | 109[1] | 79.94[1] | 249.43[1] | 51.17[1] |
| NaCN (ai) | -89.5[1] | -89.5[1] | 153.1[1] | – |
| NaCN (cr) 1/2 hydrate | -235.77[1] | – | – | – |
| NaCN (cr) 2 hydrate | -679.77[1] | – | – | – |
| NH3 (g) | -46.11[1] | -16.45[1] | 192.45[1] | 35.06[1] |
| NH3 (ao) | -80.29[1] | -26.50[1] | 111.3[1] | – |
| (cr) graphite | 0[1] | 0[1] | 5.740[1] | 8.527[1] |
| (cr) diamond | 1.895[1] | 2.900[1] | 2.377[1] | 6.113[1] |
| (g) | 716.682[1] | 671.257[1] | 158.096[1] | 20.838[1] |
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (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°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 130.684 J · K−1 · mol−1
- ^ Cp°, 28.824 J · K−1 · mol−1
- ^ ΔfH°, -4.2 kJ · mol−1
- ^ ΔfG°, 17.6 kJ · mol−1
- ^ S°, 577 J · K−1 · mol−1
- ^ ΔfH°, -505.0 kJ · mol−1
- ^ ΔfG°, -352.53 kJ · mol−1
- ^ S°, 331.0 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 27.28 J · K−1 · mol−1
- ^ Cp°, 25.10 J · K−1 · mol−1
- ^ ΔfH°, 416.3 kJ · mol−1
- ^ ΔfG°, 370.7 kJ · mol−1
- ^ S°, 180.490 J · K−1 · mol−1
- ^ Cp°, 25.677 J · K−1 · mol−1
- ^ ΔfH°, -87.49 kJ · mol−1
- ^ ΔfG°, -76.43 kJ · mol−1
- ^ S°, 115.60 J · K−1 · mol−1
- ^ Cp°, 70.37 J · K−1 · mol−1
- ^ ΔfH°, -90.75 kJ · mol−1
- ^ ΔfH°, 109. kJ · mol−1
- ^ ΔfG°, 79.94 kJ · mol−1
- ^ S°, 249.43 J · K−1 · mol−1
- ^ Cp°, 51.17 J · K−1 · mol−1
- ^ ΔfH°, -89.5 kJ · mol−1
- ^ ΔfG°, -89.5 kJ · mol−1
- ^ S°, 153.1 J · K−1 · mol−1
- ^ ΔfH°, -235.77 kJ · mol−1
- ^ ΔfH°, -679.77 kJ · mol−1
- ^ ΔfH°, -46.11 kJ · mol−1
- ^ ΔfG°, -16.45 kJ · mol−1
- ^ S°, 192.45 J · K−1 · mol−1
- ^ Cp°, 35.06 J · K−1 · mol−1
- ^ ΔfH°, -80.29 kJ · mol−1
- ^ ΔfG°, -26.50 kJ · mol−1
- ^ S°, 111.3 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 5.740 J · K−1 · mol−1
- ^ Cp°, 8.527 J · K−1 · mol−1
- ^ ΔfH°, 1.895 kJ · mol−1
- ^ ΔfG°, 2.900 kJ · mol−1
- ^ S°, 2.377 J · K−1 · mol−1
- ^ Cp°, 6.113 J · K−1 · mol−1
- ^ ΔfH°, 716.682 kJ · mol−1
- ^ ΔfG°, 671.257 kJ · mol−1
- ^ S°, 158.096 J · K−1 · mol−1
- ^ Cp°, 20.838 J · K−1 · mol−1