9C + 4H3AsO3 → 2As2O3 + 6CO↑ + 3CH4↑
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- Reaction of and arsenous acid
The reaction of and arsenous acid yields diarsenic trioxide, carbon monoxide, 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 arsenous acid
General equation
- Reaction of self redoxing species and acid
- Self-redoxing speciesSelf redox agent + AcidNon-redox agent ⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Reaction of and arsenous acid
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| 9 | – | Self redoxing | ||
| H3AsO3 | Arsenous acid | 4 | – | Acid |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| As2O3 | Diarsenic trioxide | 2 | – | – |
| CO | Carbon monoxide | 6 | Oxidized | – |
| 3 | Reduced | – |
Thermodynamic changes
Changes in standard condition (1)
- Reaction of and arsenous acid
| 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 | 827.6 | – | – | – |
| 91.96 | – | – | – | |
per 1 mol of | 206.9 | – | – | – |
per 1 mol of | 413.8 | – | – | – |
per 1 mol of | 137.9 | – | – | – |
| 275.9 | – | – | – |
Changes in standard condition (2)
- Reaction of and arsenous acid
| 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 | 784.9 | – | – | – |
| 87.21 | – | – | – | |
per 1 mol of | 196.2 | – | – | – |
per 1 mol of | 392.4 | – | – | – |
per 1 mol of | 130.8 | – | – | – |
| 261.6 | – | – | – |
Changes in standard condition (3)
- Reaction of and arsenous acid
| 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 | 765.0 | – | – | – |
| 85.00 | – | – | – | |
per 1 mol of | 191.3 | – | – | – |
per 1 mol of | 382.5 | – | – | – |
per 1 mol of | 127.5 | – | – | – |
| 255.0 | – | – | – |
Changes in standard condition (4)
- Reaction of and arsenous acid
| 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 | 722.3 | – | – | – |
| 80.26 | – | – | – | |
per 1 mol of | 180.6 | – | – | – |
per 1 mol of | 361.1 | – | – | – |
per 1 mol of | 120.4 | – | – | – |
| 240.8 | – | – | – |
Changes in standard condition (5)
- Reaction of and arsenous acid
| 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 | 827.6 | – | – | – |
| 91.96 | – | – | – | |
per 1 mol of | 206.9 | – | – | – |
per 1 mol of | 413.8 | – | – | – |
per 1 mol of | 137.9 | – | – | – |
| 275.9 | – | – | – |
Changes in standard condition (6)
- Reaction of and arsenous acid
| 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 | 784.9 | – | – | – |
| 87.21 | – | – | – | |
per 1 mol of | 196.2 | – | – | – |
per 1 mol of | 392.4 | – | – | – |
per 1 mol of | 130.8 | – | – | – |
| 261.6 | – | – | – |
Changes in standard condition (7)
- Reaction of and arsenous acid
| 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 | 765.0 | – | – | – |
| 85.00 | – | – | – | |
per 1 mol of | 191.3 | – | – | – |
per 1 mol of | 382.5 | – | – | – |
per 1 mol of | 127.5 | – | – | – |
| 255.0 | – | – | – |
Changes in standard condition (8)
- Reaction of and arsenous acid
| 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 | 722.3 | – | – | – |
| 80.26 | – | – | – | |
per 1 mol of | 180.6 | – | – | – |
per 1 mol of | 361.1 | – | – | – |
per 1 mol of | 120.4 | – | – | – |
| 240.8 | – | – | – |
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) graphite | 0[1] | 0[1] | 5.740[1] | 8.527[1] |
| (cr) diamond | 1.895[1] | 2.900[1] | 2.377[1] | 6.113[1] |
| (g) | 716.682[1] | 671.257[1] | 158.096[1] | 20.838[1] |
| H3AsO3 (ao) | -742.2[1] | -639.80[1] | 195.0[1] | – |
| H3AsO3 (aq) | -742.2[1] | – | – | – |
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution, (aq):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 |
|---|---|---|---|---|
| As2O3 (cr) octahedral | -656.97[1] | -576.22[1] | 107.1[1] | 95.65[1] |
| As2O3 (cr) monoclinic | -654.8[1] | -576.97[1] | 117[1] | – |
| As2O3 (g) | -604.6[1] | -548.9[1] | 191[1] | – |
| As2O3 (aq) | -626.8[1] | – | – | – |
| CO (g) | -110.525[1] | -137.168[1] | 197.674[1] | 29.142[1] |
| CO (ao) | -120.96[1] | -119.90[1] | 104.6[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, (g):Gas, (aq):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 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 5.740 J · K−1 · mol−1
- ^ Cp°, 8.527 J · K−1 · mol−1
- ^ ΔfH°, 1.895 kJ · mol−1
- ^ ΔfG°, 2.900 kJ · mol−1
- ^ S°, 2.377 J · K−1 · mol−1
- ^ Cp°, 6.113 J · K−1 · mol−1
- ^ ΔfH°, 716.682 kJ · mol−1
- ^ ΔfG°, 671.257 kJ · mol−1
- ^ S°, 158.096 J · K−1 · mol−1
- ^ Cp°, 20.838 J · K−1 · mol−1
- ^ ΔfH°, -742.2 kJ · mol−1
- ^ ΔfG°, -639.80 kJ · mol−1
- ^ S°, 195.0 J · K−1 · mol−1
- ^ ΔfH°, -742.2 kJ · mol−1
- ^ ΔfH°, -656.97 kJ · mol−1
- ^ ΔfG°, -576.22 kJ · mol−1
- ^ S°, 107.1 J · K−1 · mol−1
- ^ Cp°, 95.65 J · K−1 · mol−1
- ^ ΔfH°, -654.8 kJ · mol−1
- ^ ΔfG°, -576.97 kJ · mol−1
- ^ S°, 117 J · K−1 · mol−1
- ^ ΔfH°, -604.6 kJ · mol−1
- ^ ΔfG°, -548.9 kJ · mol−1
- ^ S°, 191 J · K−1 · mol−1
- ^ ΔfH°, -626.8 kJ · mol−1
- ^ ΔfH°, -110.525 kJ · mol−1
- ^ ΔfG°, -137.168 kJ · mol−1
- ^ S°, 197.674 J · K−1 · mol−1
- ^ Cp°, 29.142 J · K−1 · mol−1
- ^ ΔfH°, -120.96 kJ · mol−1
- ^ ΔfG°, -119.90 kJ · mol−1
- ^ S°, 104.6 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