6NH4CN + 9O2 → 4N2 + 2(NH4)2CO3 + 4H2CO3
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- Reaction of ammonium cyanide and
The reaction of ammonium cyanide and yields , ammonium carbonate, and carbonic acid (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 ammonium cyanide and
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 ammonium cyanide and
Reactants
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
NH4CN | Ammonium cyanide | 6 | Reducing | Reducing |
9 | Oxidizing | Oxidizing |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
4 | Oxidized | – | ||
(NH4)2CO3 | Ammonium carbonate | 2 | Redoxed product | – |
H2CO3 | Carbonic acid | 4 | Redoxed product | – |
Thermodynamic changes
Changes in aqueous solution (1)
- Reaction of ammonium cyanide and ◆
ΔrG −4570.8 kJ/mol K 5.88 × 10800 pK −800.77
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 | −4685.6 | −4570.8 | −387.3 | – |
per 1 mol of | −780.93 | −761.80 | −64.55 | – |
−520.62 | −507.87 | −43.03 | – | |
−1171.4 | −1142.7 | −96.83 | – | |
per 1 mol of | −2342.8 | −2285.4 | −193.7 | – |
per 1 mol of | −1171.4 | −1142.7 | −96.83 | – |
Changes in aqueous solution (2)
- Reaction of ammonium cyanide and
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 | −4770.8 | – | – | – |
per 1 mol of | −795.13 | – | – | – |
−530.09 | – | – | – | |
−1192.7 | – | – | – | |
per 1 mol of | −2385.4 | – | – | – |
per 1 mol of | −1192.7 | – | – | – |
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 |
---|---|---|---|---|
NH4CN (cr) | 0.42[1] | – | – | 134[1] |
NH4CN (ai) | 18.0[1] | 93.0[1] | 207.5[1] | – |
NH4CN (aq) | 32.2[1] | – | – | – |
(g) | 0[1] | 0[1] | 205.138[1] | 29.355[1] |
(ao) | -11.7[1] | 16.4[1] | 110.9[1] | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (aq):Aqueous solution, (g):Gas, (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 |
---|---|---|---|---|
(g) | 0[1] | 0[1] | 191.61[1] | 29.125[1] |
(NH4)2CO3 (ai) | -942.15[1] | -686.42[1] | 169.9[1] | – |
H2CO3 (ao) | -699.65[1] | -623.08[1] | 187.4[1] | – |
* (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°, 0.42 kJ · mol−1
- ^ Cp°, 134. J · K−1 · mol−1
- ^ ΔfH°, 18.0 kJ · mol−1
- ^ ΔfG°, 93.0 kJ · mol−1
- ^ S°, 207.5 J · K−1 · mol−1
- ^ ΔfH°, 32.2 kJ · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 205.138 J · K−1 · mol−1
- ^ Cp°, 29.355 J · K−1 · mol−1
- ^ ΔfH°, -11.7 kJ · mol−1
- ^ ΔfG°, 16.4 kJ · mol−1
- ^ S°, 110.9 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 191.61 J · K−1 · mol−1
- ^ Cp°, 29.125 J · K−1 · mol−1
- ^ ΔfH°, -942.15 kJ · mol−1
- ^ ΔfG°, -686.42 kJ · mol−1
- ^ S°, 169.9 J · K−1 · mol−1
- ^ ΔfH°, -699.65 kJ · mol−1
- ^ ΔfG°, -623.08 kJ · mol−1
- ^ S°, 187.4 J · K−1 · mol−1