2Cs + 2HBr → 2CsBr + H2
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- Reaction of and hydrogen bromide
The reaction of and hydrogen bromide yields caesium bromide and . This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of and hydrogen bromide
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 hydrogen bromide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| 2 | Reducing | Reducing Active metal | ||
| HBr | Hydrogen bromide | 2 | Oxidizing | Reducible Acid |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CsBr | Caesium bromide | 2 | Oxidized | – Salt |
| 1 | Reduced | – Hydrogen |
Thermodynamic changes
Changes in standard condition
- Reaction of and hydrogen bromide◆
ΔrG −675.92 kJ/mol K 2.61 × 10118 pK −118.42
| 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 | −738.82 | −675.92 | −211.07 | 12.06 |
| −369.41 | −337.96 | −105.53 | 6.030 | |
per 1 mol of | −369.41 | −337.96 | −105.53 | 6.030 |
per 1 mol of | −369.41 | −337.96 | −105.53 | 6.030 |
| −738.82 | −675.92 | −211.07 | 12.06 |
Changes in aqueous solution (1)
- Reaction of and hydrogen bromide◆
ΔrG −584.02 kJ/mol K 2.07 × 10102 pK −102.32
| 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 | −516.54 | −584.02 | 226.4 | – |
| −258.27 | −292.01 | 113.2 | – | |
per 1 mol of | −258.27 | −292.01 | 113.2 | – |
per 1 mol of | −258.27 | −292.01 | 113.2 | – |
| −516.54 | −584.02 | 226.4 | – |
Changes in aqueous solution (2)
- Reaction of and hydrogen bromide◆
ΔrG −566.4 kJ/mol K 1.69 × 1099 pK −99.23
| 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 | −520.7 | −566.4 | 673 | – |
| −260.4 | −283.2 | 337 | – | |
per 1 mol of | −260.4 | −283.2 | 337 | – |
per 1 mol of | −260.4 | −283.2 | 337 | – |
| −520.7 | −566.4 | 673 | – |
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] | 85.23[1] | 32.17[1] |
| (g) | 76.065[1] | 49.121[1] | 175.595[1] | 20.786[1] |
| HBr (g) | -36.40[1] | -53.45[1] | 198.695[1] | 29.142[1] |
| HBr (ai) | -121.55[1] | -103.96[1] | 82.4[1] | -141.8[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 |
|---|---|---|---|---|
| CsBr (cr) | -405.81[1] | -391.41[1] | 113.05[1] | 52.93[1] |
| CsBr (g) | -209.2[1] | -241.0[1] | 267.43[1] | 37.07[1] |
| CsBr (ai) | -379.82[1] | -395.97[1] | 215.48[1] | – |
| (g) | 0[1] | 0[1] | 130.684[1] | 28.824[1] |
| (ao) | -4.2[1] | 17.6[1] | 577[1] | – |
* (cr):Crystalline solid, (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 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 85.23 J · K−1 · mol−1
- ^ Cp°, 32.17 J · K−1 · mol−1
- ^ ΔfH°, 76.065 kJ · mol−1
- ^ ΔfG°, 49.121 kJ · mol−1
- ^ S°, 175.595 J · K−1 · mol−1
- ^ Cp°, 20.786 J · K−1 · mol−1
- ^ ΔfH°, -36.40 kJ · mol−1
- ^ ΔfG°, -53.45 kJ · mol−1
- ^ S°, 198.695 J · K−1 · mol−1
- ^ Cp°, 29.142 J · K−1 · mol−1
- ^ ΔfH°, -121.55 kJ · mol−1
- ^ ΔfG°, -103.96 kJ · mol−1
- ^ S°, 82.4 J · K−1 · mol−1
- ^ Cp°, -141.8 J · K−1 · mol−1
- ^ ΔfH°, -405.81 kJ · mol−1
- ^ ΔfG°, -391.41 kJ · mol−1
- ^ S°, 113.05 J · K−1 · mol−1
- ^ Cp°, 52.93 J · K−1 · mol−1
- ^ ΔfH°, -209.2 kJ · mol−1
- ^ ΔfG°, -241.0 kJ · mol−1
- ^ S°, 267.43 J · K−1 · mol−1
- ^ Cp°, 37.07 J · K−1 · mol−1
- ^ ΔfH°, -379.82 kJ · mol−1
- ^ ΔfG°, -395.97 kJ · mol−1
- ^ S°, 215.48 J · K−1 · mol−1
- ^ 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