CaBr2 🔥⚡→ Ca + Br2
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- Molten salt electrolysis of calcium bromide
Molten salt electrolysis of calcium bromide yields and . This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Molten salt electrolysis of calcium bromide
General equation
- Molten salt electrolysis
- SaltSelf redox agent🔥⚡⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Molten salt electrolysis of calcium bromide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaBr2 | Calcium bromide | 1 | Self redox agent | Salt |
Products
Thermodynamic changes
Changes in standard condition
- Molten salt electrolysis of calcium bromide◆
ΔrG 663.6 kJ/mol K 0.55 × 10−116 pK 116.26
| 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 | 682.8 | 663.6 | 64 | – |
per 1 mol of | 682.8 | 663.6 | 64 | – |
| 682.8 | 663.6 | 64 | – | |
| 682.8 | 663.6 | 64 | – |
Changes in aqueous solution
- Molten salt electrolysis of calcium bromide◆
ΔrG 765.42 kJ/mol K 0.80 × 10−134 pK 134.10
| 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 | 783.33 | 765.42 | 60.2 | – |
per 1 mol of | 783.33 | 765.42 | 60.2 | – |
| 783.33 | 765.42 | 60.2 | – | |
| 783.33 | 765.42 | 60.2 | – |
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 |
|---|---|---|---|---|
| CaBr2 (cr) | -682.8[1] | -663.6[1] | 130[1] | – |
| CaBr2 (g) | -398.3[1] | – | – | – |
| CaBr2 (ai) | -785.92[1] | -761.49[1] | 111.7[1] | – |
| CaBr2 (cr) 6 hydrate | -2506.2[1] | -2152.8[1] | 410[1] | – |
* (cr):Crystalline solid, (g):Gas, (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 |
|---|---|---|---|---|
| (cr) α | 0[1] | 0[1] | 41.42[1] | 25.31[1] |
| (g) | 178.2[1] | 144.3[1] | 154.884[1] | 20.786[1] |
| (cr) | – | – | – | – |
| (l) | 0[1] | 0[1] | 152.231[1] | 75.689[1] |
| (g) | 30.907[1] | 3.110[1] | 245.463[1] | 36.02[1] |
| (ao) | -2.59[1] | 3.93[1] | 130.5[1] | – |
* (cr):Crystalline solid, (g):Gas, (l):Liquid, (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°, -682.8 kJ · mol−1
- ^ ΔfG°, -663.6 kJ · mol−1
- ^ S°, 130. J · K−1 · mol−1
- ^ ΔfH°, -398.3 kJ · mol−1
- ^ ΔfH°, -785.92 kJ · mol−1
- ^ ΔfG°, -761.49 kJ · mol−1
- ^ S°, 111.7 J · K−1 · mol−1
- ^ ΔfH°, -2506.2 kJ · mol−1
- ^ ΔfG°, -2152.8 kJ · mol−1
- ^ S°, 410. J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 41.42 J · K−1 · mol−1
- ^ Cp°, 25.31 J · K−1 · mol−1
- ^ ΔfH°, 178.2 kJ · mol−1
- ^ ΔfG°, 144.3 kJ · mol−1
- ^ S°, 154.884 J · K−1 · mol−1
- ^ Cp°, 20.786 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 152.231 J · K−1 · mol−1
- ^ Cp°, 75.689 J · K−1 · mol−1
- ^ ΔfH°, 30.907 kJ · mol−1
- ^ ΔfG°, 3.110 kJ · mol−1
- ^ S°, 245.463 J · K−1 · mol−1
- ^ Cp°, 36.02 J · K−1 · mol−1
- ^ ΔfH°, -2.59 kJ · mol−1
- ^ ΔfG°, 3.93 kJ · mol−1
- ^ S°, 130.5 J · K−1 · mol−1