2CsHCO3 🔥→ Cs2CO3 + CO2↑ + H2O
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- Decomposition of caesium hydrogencarbonate
Decomposition of caesium hydrogencarbonate yields caesium carbonate, carbon dioxide, and water (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Decomposition of caesium hydrogencarbonate
General equation
- Thermal decomposition without redox
- Thermally decomposable substanceLewis conjugate🔥⟶ ProductLewis acid + ProductLewis base
Oxidation state of each atom
- Decomposition of caesium hydrogencarbonate
Reactants
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
CsHCO3 | Caesium hydrogencarbonate | 2 | Lewis conjugate | Thermally decomposable |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
Cs2CO3 | Caesium carbonate | 1 | Lewis acid | – |
CO2 | Carbon dioxide | 1 | Lewis acid | – |
H2O | Water | 1 | Lewis acid | – |
Thermodynamic changes
Changes in standard condition
- Decomposition of caesium hydrogencarbonate
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 | 113.2 | – | – | – |
per 1 mol of | 56.60 | – | – | – |
per 1 mol of | 113.2 | – | – | – |
per 1 mol of | 113.2 | – | – | – |
per 1 mol of | 113.2 | – | – | – |
Changes in aqueous solution (1)
- Decomposition of caesium hydrogencarbonate◆
ΔrG 14.22 kJ/mol K 0.32 × 10−2 pK 2.49
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 | 27.50 | 14.22 | 44.3 | – |
per 1 mol of | 13.75 | 7.110 | 22.1 | – |
per 1 mol of | 27.50 | 14.22 | 44.3 | – |
per 1 mol of | 27.50 | 14.22 | 44.3 | – |
per 1 mol of | 27.50 | 14.22 | 44.3 | – |
Changes in aqueous solution (2)
- Decomposition of caesium hydrogencarbonate◆
ΔrG 22.60 kJ/mol K 0.11 × 10−3 pK 3.96
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 | 7.21 | 22.60 | −51.9 | – |
per 1 mol of | 3.60 | 11.30 | −25.9 | – |
per 1 mol of | 7.21 | 22.60 | −51.9 | – |
per 1 mol of | 7.21 | 22.60 | −51.9 | – |
per 1 mol of | 7.21 | 22.60 | −51.9 | – |
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 |
---|---|---|---|---|
CsHCO3 (cr) | -966.1[1] | – | – | – |
CsHCO3 (ai) | -950.27[1] | -878.78[1] | 224.3[1] | – |
* (cr):Crystalline solid, (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 |
---|---|---|---|---|
Cs2CO3 (cr) | -1139.7[1] | -1054.3[1] | 204.47[1] | 123.85[1] |
Cs2CO3 (ai) | -1193.70[1] | -1111.85[1] | 209.2[1] | – |
Cs2CO3 (cr) 3 hydrate | -2048.1[1] | – | – | – |
CO2 (g) | -393.509[1] | -394.359[1] | 213.74[1] | 37.11[1] |
CO2 (ao) | -413.80[1] | -385.98[1] | 117.6[1] | – |
H2O (cr) | – | – | – | – |
H2O (l) | -285.830[1] | -237.129[1] | 69.91[1] | 75.291[1] |
H2O (g) | -241.818[1] | -228.572[1] | 188.825[1] | 33.577[1] |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution, (l):Liquid
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°, -966.1 kJ · mol−1
- ^ ΔfH°, -950.27 kJ · mol−1
- ^ ΔfG°, -878.78 kJ · mol−1
- ^ S°, 224.3 J · K−1 · mol−1
- ^ ΔfH°, -1139.7 kJ · mol−1
- ^ ΔfG°, -1054.3 kJ · mol−1
- ^ S°, 204.47 J · K−1 · mol−1
- ^ Cp°, 123.85 J · K−1 · mol−1
- ^ ΔfH°, -1193.70 kJ · mol−1
- ^ ΔfG°, -1111.85 kJ · mol−1
- ^ S°, 209.2 J · K−1 · mol−1
- ^ ΔfH°, -2048.1 kJ · mol−1
- ^ ΔfH°, -393.509 kJ · mol−1
- ^ ΔfG°, -394.359 kJ · mol−1
- ^ S°, 213.74 J · K−1 · mol−1
- ^ Cp°, 37.11 J · K−1 · mol−1
- ^ ΔfH°, -413.80 kJ · mol−1
- ^ ΔfG°, -385.98 kJ · mol−1
- ^ S°, 117.6 J · K−1 · mol−1
- ^ ΔfH°, -285.830 kJ · mol−1
- ^ ΔfG°, -237.129 kJ · mol−1
- ^ S°, 69.91 J · K−1 · mol−1
- ^ Cp°, 75.291 J · K−1 · mol−1
- ^ ΔfH°, -241.818 kJ · mol−1
- ^ ΔfG°, -228.572 kJ · mol−1
- ^ S°, 188.825 J · K−1 · mol−1
- ^ Cp°, 33.577 J · K−1 · mol−1