2H2S + Co(NO3)2 → H2SO3 + 2NO + CoS + H2O
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The reaction of hydrogen sulfide and cobalt(II) nitrate yields sulfurous acid, nitrogen monoxide, cobalt(II) sulfide, and water (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 hydrogen sulfide and cobalt(II) nitrate
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 hydrogen sulfide and cobalt(II) nitrate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| H2S | Hydrogen sulfide | 2 | Reducing | Reducing |
| Co(NO3)2 | Cobalt(II) nitrate | 1 | Oxidizing | Oxidizing |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| H2SO3 | Sulfurous acid | 1 | Oxidized | – |
| NO | Nitrogen monoxide | 2 | Reduced | – |
| CoS | Cobalt(II) sulfide | 1 | – | – |
| H2O | Water | 1 | – | – |
Thermodynamic changes
Changes in standard condition
- Reaction of hydrogen sulfide and cobalt(II) nitrate
| 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 | −244.7 | – | – | – |
per 1 mol of | −122.3 | – | – | – |
per 1 mol of | −244.7 | – | – | – |
per 1 mol of | −244.7 | – | – | – |
per 1 mol of | −122.3 | – | – | – |
per 1 mol of | −244.7 | – | – | – |
per 1 mol of | −244.7 | – | – | – |
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 |
|---|---|---|---|---|
| H2S (g) | -20.63[1] | -33.56[1] | 205.79[1] | 34.23[1] |
| H2S (ao) | -39.7[1] | -27.83[1] | 121[1] | – |
| Co(NO3)2 (cr) | -420.5[1] | – | – | – |
| Co(NO3)2 (ai) | -472.8[1] | -276.9[1] | 180[1] | – |
| Co(NO3)2 (cr) 2 hydrate | -1021.7[1] | – | – | – |
| Co(NO3)2 (cr) 3 hydrate | -1325.9[1] | – | – | – |
| Co(NO3)2 (cr) 4 hydrate | -1630.5[1] | – | – | – |
| Co(NO3)2 (cr) 6 hydrate | -2211.20[1] | – | – | 452[1] |
* (g):Gas, (ao):Un-ionized aqueous solution, (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 |
|---|---|---|---|---|
| H2SO3 (ao) | -608.81[1] | -537.81[1] | 232.2[1] | – |
| NO (g) | 90.25[1] | 86.55[1] | 210.761[1] | 29.844[1] |
| CoS (cr) | -82.8[1] | – | – | – |
| H2O (cr) | – | – | – | – |
| H2O (l) | -285.830[1] | -237.129[1] | 69.91[1] | 75.291[1] |
| H2O (g) | -241.818[1] | -228.572[1] | 188.825[1] | 33.577[1] |
* (ao):Un-ionized aqueous solution, (g):Gas, (cr):Crystalline solid, (l):Liquid
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°, -20.63 kJ · mol−1
- ^ ΔfG°, -33.56 kJ · mol−1
- ^ S°, 205.79 J · K−1 · mol−1
- ^ Cp°, 34.23 J · K−1 · mol−1
- ^ ΔfH°, -39.7 kJ · mol−1
- ^ ΔfG°, -27.83 kJ · mol−1
- ^ S°, 121. J · K−1 · mol−1
- ^ ΔfH°, -420.5 kJ · mol−1
- ^ ΔfH°, -472.8 kJ · mol−1
- ^ ΔfG°, -276.9 kJ · mol−1
- ^ S°, 180. J · K−1 · mol−1
- ^ ΔfH°, -1021.7 kJ · mol−1
- ^ ΔfH°, -1325.9 kJ · mol−1
- ^ ΔfH°, -1630.5 kJ · mol−1
- ^ ΔfH°, -2211.20 kJ · mol−1
- ^ Cp°, 452. J · K−1 · mol−1
- ^ ΔfH°, -608.81 kJ · mol−1
- ^ ΔfG°, -537.81 kJ · mol−1
- ^ S°, 232.2 J · K−1 · mol−1
- ^ ΔfH°, 90.25 kJ · mol−1
- ^ ΔfG°, 86.55 kJ · mol−1
- ^ S°, 210.761 J · K−1 · mol−1
- ^ Cp°, 29.844 J · K−1 · mol−1
- ^ ΔfH°, -82.8 kJ · mol−1
- ^ ΔfH°, -285.830 kJ · mol−1
- ^ ΔfG°, -237.129 kJ · mol−1
- ^ S°, 69.91 J · K−1 · mol−1
- ^ Cp°, 75.291 J · K−1 · mol−1
- ^ ΔfH°, -241.818 kJ · mol−1
- ^ ΔfG°, -228.572 kJ · mol−1
- ^ S°, 188.825 J · K−1 · mol−1
- ^ Cp°, 33.577 J · K−1 · mol−1