7Na2Se + 8KMnO4 → 3Na2SeO4 + 4Na2O + 8MnO2 + 4K2Se
Last updated:
The reaction of sodium selenide and potassium permanganate yields sodium selenate, sodium oxide, manganese(IV) oxide, and potassium selenide (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 selenide and potassium permanganate
General equation
- Reaction of reducing species and oxidizing species
- Reducing speciesReducing agent + Oxidizing speciesOxidizing agent ⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Reaction of sodium selenide and potassium permanganate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na2Se | Sodium selenide | 7 | Reducing | Reducing |
| KMnO4 | Potassium permanganate | 8 | Oxidizing | Oxidizing |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na2SeO4 | Sodium selenate | 3 | Oxidized | – |
| Na2O | Sodium oxide | 4 | – | – |
| MnO2 | Manganese(IV) oxide | 8 | Reduced | – |
| K2Se | Potassium selenide | 4 | – | – |
Thermodynamic changes
Changes in standard condition (1)
- Reaction of sodium selenide and potassium permanganate
| 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 | −1516.7 | – | – | – |
per 1 mol of | −216.67 | – | – | – |
per 1 mol of | −189.59 | – | – | – |
per 1 mol of | −505.57 | – | – | – |
per 1 mol of | −379.18 | – | – | – |
per 1 mol of | −189.59 | – | – | – |
per 1 mol of | −379.18 | – | – | – |
Changes in standard condition (2)
- Reaction of sodium selenide and potassium permanganate
| 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 | −1376.5 | – | – | – |
per 1 mol of | −196.64 | – | – | – |
per 1 mol of | −172.06 | – | – | – |
per 1 mol of | −458.83 | – | – | – |
per 1 mol of | −344.13 | – | – | – |
per 1 mol of | −172.06 | – | – | – |
per 1 mol of | −344.13 | – | – | – |
Changes in aqueous solution
- Reaction of sodium selenide and potassium permanganate◆
ΔrG −1261.2 kJ/mol K 8.97 × 10220 pK −220.95
| 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 | – | −1261.2 | – | – |
per 1 mol of | – | −180.17 | – | – |
per 1 mol of | – | −157.65 | – | – |
per 1 mol of | – | −420.40 | – | – |
per 1 mol of | – | −315.30 | – | – |
per 1 mol of | – | −157.65 | – | – |
per 1 mol of | – | −315.30 | – | – |
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 |
|---|---|---|---|---|
| Na2Se (cr) | -341.4[1] | – | – | – |
| Na2Se (ai) | – | -394.6[1] | – | – |
| Na2Se (cr) 4.5 hydrate | -1741.0[1] | – | – | – |
| Na2Se (cr) 9 hydrate | -3040.1[1] | – | – | – |
| Na2Se (cr) 16 hydrate | -5091.9[1] | – | – | – |
| KMnO4 (cr) | -837.2[1] | -737.6[1] | 171.71[1] | 117.57[1] |
| KMnO4 (ai) | -793.8[1] | -730.5[1] | 293.7[1] | -60.2[1] |
* (cr):Crystalline solid, (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 |
|---|---|---|---|---|
| Na2SeO4 (cr) | -1069.0[1] | – | – | – |
| Na2SeO4 (ai) | -1079.5[1] | -965.2[1] | 172.0[1] | – |
| Na2SeO4 (cr) 10 hydrate | -4006.6[1] | – | – | – |
| Na2O (cr) | -414.22[1] | -375.46[1] | 75.06[1] | 69.12[1] |
| Na2O (g) | -35.6[1] | -52.3[1] | 261.2[1] | 55.2[1] |
| MnO2 (cr) | -520.03[1] | -465.14[1] | 53.05[1] | 54.14[1] |
| MnO2 (am) precipitated | -502.5[1] | – | – | – |
| K2Se (cr) | -395.0[1] | – | – | – |
| K2Se (ai) | – | -437.2[1] | – | – |
| K2Se (cr) 9 hydrate | -3087.0[1] | – | – | – |
| K2Se (cr) 14 hydrate | -4524.2[1] | – | – | – |
| K2Se (cr) 19 hydrate | -5991.9[1] | – | – | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (am):Amorphous solid
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°, -341.4 kJ · mol−1
- ^ ΔfG°, -394.6 kJ · mol−1
- ^ ΔfH°, -1741.0 kJ · mol−1
- ^ ΔfH°, -3040.1 kJ · mol−1
- ^ ΔfH°, -5091.9 kJ · mol−1
- ^ ΔfH°, -837.2 kJ · mol−1
- ^ ΔfG°, -737.6 kJ · mol−1
- ^ S°, 171.71 J · K−1 · mol−1
- ^ Cp°, 117.57 J · K−1 · mol−1
- ^ ΔfH°, -793.8 kJ · mol−1
- ^ ΔfG°, -730.5 kJ · mol−1
- ^ S°, 293.7 J · K−1 · mol−1
- ^ Cp°, -60.2 J · K−1 · mol−1
- ^ ΔfH°, -1069.0 kJ · mol−1
- ^ ΔfH°, -1079.5 kJ · mol−1
- ^ ΔfG°, -965.2 kJ · mol−1
- ^ S°, 172.0 J · K−1 · mol−1
- ^ ΔfH°, -4006.6 kJ · mol−1
- ^ ΔfH°, -414.22 kJ · mol−1
- ^ ΔfG°, -375.46 kJ · mol−1
- ^ S°, 75.06 J · K−1 · mol−1
- ^ Cp°, 69.12 J · K−1 · mol−1
- ^ ΔfH°, -35.6 kJ · mol−1
- ^ ΔfG°, -52.3 kJ · mol−1
- ^ S°, 261.2 J · K−1 · mol−1
- ^ Cp°, 55.2 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°, -395.0 kJ · mol−1
- ^ ΔfG°, -437.2 kJ · mol−1
- ^ ΔfH°, -3087.0 kJ · mol−1
- ^ ΔfH°, -4524.2 kJ · mol−1
- ^ ΔfH°, -5991.9 kJ · mol−1