2H2 + 2CuSCN → Cu2S + H2S + 2HCN
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- Reaction of and copper(I) thiocyanate
The reaction of and copper(I) thiocyanate yields copper(I) sulfide, hydrogen sulfide, and hydrogen cyanide (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 copper(I) thiocyanate
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 copper(I) thiocyanate
Reactants
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
2 | Reducing | Reducing | ||
CuSCN | Copper(I) thiocyanate | 2 | Oxidizing | Reducible |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
Cu2S | Copper(I) sulfide | 1 | – | – |
H2S | Hydrogen sulfide | 1 | Oxidized | – |
HCN | Hydrogen cyanide | 2 | Redoxed product | – |
Thermodynamic changes
Changes in standard condition
- Reaction of and copper(I) thiocyanate◆
ΔrG −9.6 kJ/mol K 4.81 × 101 pK −1.68
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 | – | −9.6 | – | – |
– | −4.8 | – | – | |
per 1 mol of | – | −4.8 | – | – |
per 1 mol of | – | −9.6 | – | – |
per 1 mol of | – | −9.6 | – | – |
per 1 mol of | – | −4.8 | – | – |
Changes in aqueous solution (1)
- Reaction of and copper(I) thiocyanate◆
ΔrG −95.5 kJ/mol K 5.38 × 1016 pK −16.73
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 | −86.8 | −95.5 | −1009 | – |
−43.4 | −47.8 | −504.5 | – | |
per 1 mol of | −43.4 | −47.8 | −504.5 | – |
per 1 mol of | −86.8 | −95.5 | −1009 | – |
per 1 mol of | −86.8 | −95.5 | −1009 | – |
per 1 mol of | −43.4 | −47.8 | −504.5 | – |
Changes in aqueous solution (2)
- Reaction of and copper(I) thiocyanate◆
ΔrG −200.9 kJ/mol K 1.57 × 1035 pK −35.20
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 | −173.8 | −200.9 | −948 | – |
−86.90 | −100.5 | −474 | – | |
per 1 mol of | −86.90 | −100.5 | −474 | – |
per 1 mol of | −173.8 | −200.9 | −948 | – |
per 1 mol of | −173.8 | −200.9 | −948 | – |
per 1 mol of | −86.90 | −100.5 | −474 | – |
Changes in aqueous solution (3)
- Reaction of and copper(I) thiocyanate◆
ΔrG −89.8 kJ/mol K 5.40 × 1015 pK −15.73
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 | −105.8 | −89.8 | −1094 | – |
−52.90 | −44.9 | −547.0 | – | |
per 1 mol of | −52.90 | −44.9 | −547.0 | – |
per 1 mol of | −105.8 | −89.8 | −1094 | – |
per 1 mol of | −105.8 | −89.8 | −1094 | – |
per 1 mol of | −52.90 | −44.9 | −547.0 | – |
Changes in aqueous solution (4)
- Reaction of and copper(I) thiocyanate◆
ΔrG −195.2 kJ/mol K 1.58 × 1034 pK −34.20
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 | −192.8 | −195.2 | −1033 | – |
−96.40 | −97.60 | −516.5 | – | |
per 1 mol of | −96.40 | −97.60 | −516.5 | – |
per 1 mol of | −192.8 | −195.2 | −1033 | – |
per 1 mol of | −192.8 | −195.2 | −1033 | – |
per 1 mol of | −96.40 | −97.60 | −516.5 | – |
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] | – |
CuSCN (cr) | – | 69.9[1] | – | – |
CuSCN (ai) | 148.11[1] | 142.69[1] | 184.9[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 |
---|---|---|---|---|
Cu2S (cr) α | -79.5[1] | -86.2[1] | 120.9[1] | 76.32[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] | – |
HCN (l) | 108.87[1] | 124.97[1] | 112.84[1] | 70.63[1] |
HCN (g) | 135.1[1] | 124.7[1] | 201.78[1] | 35.86[1] |
HCN (ai) | 150.6[1] | 172.4[1] | 94.1[1] | – |
HCN (ao) | 107.1[1] | 119.7[1] | 124.7[1] | – |
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution, (l):Liquid, (ai):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
- ^ ΔfG°, 69.9 kJ · mol−1
- ^ ΔfH°, 148.11 kJ · mol−1
- ^ ΔfG°, 142.69 kJ · mol−1
- ^ S°, 184.9 J · K−1 · mol−1
- ^ ΔfH°, -79.5 kJ · mol−1
- ^ ΔfG°, -86.2 kJ · mol−1
- ^ S°, 120.9 J · K−1 · mol−1
- ^ Cp°, 76.32 J · K−1 · mol−1
- ^ 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°, 108.87 kJ · mol−1
- ^ ΔfG°, 124.97 kJ · mol−1
- ^ S°, 112.84 J · K−1 · mol−1
- ^ Cp°, 70.63 J · K−1 · mol−1
- ^ ΔfH°, 135.1 kJ · mol−1
- ^ ΔfG°, 124.7 kJ · mol−1
- ^ S°, 201.78 J · K−1 · mol−1
- ^ Cp°, 35.86 J · K−1 · mol−1
- ^ ΔfH°, 150.6 kJ · mol−1
- ^ ΔfG°, 172.4 kJ · mol−1
- ^ S°, 94.1 J · K−1 · mol−1
- ^ ΔfH°, 107.1 kJ · mol−1
- ^ ΔfG°, 119.7 kJ · mol−1
- ^ S°, 124.7 J · K−1 · mol−1