16Na + 17HSCN → 15NaSCN + NaHS + (NH4)2S + 2CH4↑
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- Reaction of and thiocyanic acid
The reaction of and thiocyanic acid yields sodium thiocyanate, sodium hydrogensulfide, ammonium sulfide, 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 thiocyanic acid
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 thiocyanic acid
Reactants
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
16 | Reducing | Reducing | ||
HSCN | Thiocyanic acid | 17 | Oxidizing | Reducible |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
NaSCN | Sodium thiocyanate | 15 | Oxidized | – |
NaHS | Sodium hydrogensulfide | 1 | Oxidized | – |
(NH4)2S | Ammonium sulfide | 1 | – | – |
2 | Reduced | – |
Thermodynamic changes
Changes in aqueous solution (1)
- Reaction of and thiocyanic acid◆
ΔrG −4537.6 kJ/mol K 8.98 × 10794 pK −794.95
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 | −4393.8 | −4537.6 | 483.5 | – |
−274.61 | −283.60 | 30.22 | – | |
per 1 mol of | −258.46 | −266.92 | 28.44 | – |
per 1 mol of | −292.92 | −302.51 | 32.23 | – |
per 1 mol of | −4393.8 | −4537.6 | 483.5 | – |
per 1 mol of | −4393.8 | −4537.6 | 483.5 | – |
−2196.9 | −2268.8 | 241.8 | – |
Changes in aqueous solution (2)
- Reaction of and thiocyanic acid◆
ΔrG −4504.8 kJ/mol K 1.61 × 10789 pK −789.21
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 | −4422.3 | −4504.8 | 278.3 | – |
−276.39 | −281.55 | 17.39 | – | |
per 1 mol of | −260.14 | −264.99 | 16.37 | – |
per 1 mol of | −294.82 | −300.32 | 18.55 | – |
per 1 mol of | −4422.3 | −4504.8 | 278.3 | – |
per 1 mol of | −4422.3 | −4504.8 | 278.3 | – |
−2211.2 | −2252.4 | 139.2 | – |
Changes in aqueous solution (3)
- Reaction of and thiocyanic acid◆
ΔrG −4620.1 kJ/mol K 2.55 × 10809 pK −809.41
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 | – | −4620.1 | – | – |
– | −288.76 | – | – | |
per 1 mol of | – | −271.77 | – | – |
per 1 mol of | – | −308.01 | – | – |
per 1 mol of | – | −4620.1 | – | – |
per 1 mol of | – | −4620.1 | – | – |
– | −2310.1 | – | – |
Changes in aqueous solution (4)
- Reaction of and thiocyanic acid◆
ΔrG −4587.3 kJ/mol K 4.57 × 10803 pK −803.66
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 | – | −4587.3 | – | – |
– | −286.71 | – | – | |
per 1 mol of | – | −269.84 | – | – |
per 1 mol of | – | −305.82 | – | – |
per 1 mol of | – | −4587.3 | – | – |
per 1 mol of | – | −4587.3 | – | – |
– | −2293.7 | – | – |
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 |
---|---|---|---|---|
(cr) | 0[1] | 0[1] | 51.21[1] | 28.24[1] |
(g) | 107.32[1] | 76.761[1] | 153.712[1] | 20.786[1] |
HSCN (ai) | 76.44[1] | 92.71[1] | 144.3[1] | -40.2[1] |
HSCN (ao) | – | 97.56[1] | – | – |
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-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 |
---|---|---|---|---|
NaSCN (cr) | -170.50[1] | – | – | – |
NaSCN (ai) | -163.68[1] | -169.18[1] | 203.3[1] | 6.3[1] |
NaHS (cr) | -237.23[1] | – | – | – |
NaHS (ai) | -257.73[1] | -249.81[1] | 121.8[1] | – |
NaHS (cr) 2 hydrate | -838.47[1] | – | – | – |
(NH4)2S (ai) | -231.8[1] | -72.6[1] | 212.1[1] | – |
(g) | -74.81[1] | -50.72[1] | 186.264[1] | 35.309[1] |
(ao) | -89.04[1] | -34.33[1] | 83.7[1] | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (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°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 51.21 J · K−1 · mol−1
- ^ Cp°, 28.24 J · K−1 · mol−1
- ^ ΔfH°, 107.32 kJ · mol−1
- ^ ΔfG°, 76.761 kJ · mol−1
- ^ S°, 153.712 J · K−1 · mol−1
- ^ Cp°, 20.786 J · K−1 · mol−1
- ^ ΔfH°, 76.44 kJ · mol−1
- ^ ΔfG°, 92.71 kJ · mol−1
- ^ S°, 144.3 J · K−1 · mol−1
- ^ Cp°, -40.2 J · K−1 · mol−1
- ^ ΔfG°, 97.56 kJ · mol−1
- ^ ΔfH°, -170.50 kJ · mol−1
- ^ ΔfH°, -163.68 kJ · mol−1
- ^ ΔfG°, -169.18 kJ · mol−1
- ^ S°, 203.3 J · K−1 · mol−1
- ^ Cp°, 6.3 J · K−1 · mol−1
- ^ ΔfH°, -237.23 kJ · mol−1
- ^ ΔfH°, -257.73 kJ · mol−1
- ^ ΔfG°, -249.81 kJ · mol−1
- ^ S°, 121.8 J · K−1 · mol−1
- ^ ΔfH°, -838.47 kJ · mol−1
- ^ ΔfH°, -231.8 kJ · mol−1
- ^ ΔfG°, -72.6 kJ · mol−1
- ^ S°, 212.1 J · K−1 · mol−1
- ^ ΔfH°, -74.81 kJ · mol−1
- ^ ΔfG°, -50.72 kJ · mol−1
- ^ S°, 186.264 J · K−1 · mol−1
- ^ Cp°, 35.309 J · K−1 · mol−1
- ^ ΔfH°, -89.04 kJ · mol−1
- ^ ΔfG°, -34.33 kJ · mol−1
- ^ S°, 83.7 J · K−1 · mol−1