CaH2 + MnO2 → CaO + MnO + H2↑
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The reaction of calcium hydride and manganese(IV) oxide yields calcium oxide, manganese(II) oxide, 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 calcium hydride and manganese(IV) oxide
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 calcium hydride and manganese(IV) oxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaH2 | Calcium hydride | 1 | Reducing | Reducing |
| MnO2 | Manganese(IV) oxide | 1 | Oxidizing | Reducible |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaO | Calcium oxide | 1 | – | – |
| MnO | Manganese(II) oxide | 1 | Reduced | – |
| 1 | Oxidized | – |
Thermodynamic changes
Changes in standard condition (1)
- Reaction of calcium hydride and manganese(IV) oxide◆
ΔrG −354.6 kJ/mol K 1.33 × 1062 pK −62.12
| 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 | −314.1 | −354.6 | 135 | – |
per 1 mol of | −314.1 | −354.6 | 135 | – |
per 1 mol of | −314.1 | −354.6 | 135 | – |
per 1 mol of | −314.1 | −354.6 | 135 | – |
per 1 mol of | −314.1 | −354.6 | 135 | – |
| −314.1 | −354.6 | 135 | – |
Changes in standard condition (2)
- Reaction of calcium hydride and manganese(IV) oxide
| 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 | −331.6 | – | – | – |
per 1 mol of | −331.6 | – | – | – |
per 1 mol of | −331.6 | – | – | – |
per 1 mol of | −331.6 | – | – | – |
per 1 mol of | −331.6 | – | – | – |
| −331.6 | – | – | – |
Changes in aqueous solution (1)
- Reaction of calcium hydride and manganese(IV) oxide◆
ΔrG −354.6 kJ/mol K 1.33 × 1062 pK −62.12
| 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 | −314.1 | −354.6 | 135 | – |
per 1 mol of | −314.1 | −354.6 | 135 | – |
per 1 mol of | −314.1 | −354.6 | 135 | – |
per 1 mol of | −314.1 | −354.6 | 135 | – |
per 1 mol of | −314.1 | −354.6 | 135 | – |
| −314.1 | −354.6 | 135 | – |
Changes in aqueous solution (2)
- Reaction of calcium hydride and manganese(IV) oxide◆
ΔrG −337.0 kJ/mol K 1.10 × 1059 pK −59.04
| 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 | −318.3 | −337.0 | 581 | – |
per 1 mol of | −318.3 | −337.0 | 581 | – |
per 1 mol of | −318.3 | −337.0 | 581 | – |
per 1 mol of | −318.3 | −337.0 | 581 | – |
per 1 mol of | −318.3 | −337.0 | 581 | – |
| −318.3 | −337.0 | 581 | – |
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 |
|---|---|---|---|---|
| CaH2 (cr) | -186.2[1] | -147.2[1] | 42[1] | – |
| MnO2 (cr) | -520.03[1] | -465.14[1] | 53.05[1] | 54.14[1] |
| MnO2 (am) precipitated | -502.5[1] | – | – | – |
* (cr):Crystalline solid, (am):Amorphous solid
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 |
|---|---|---|---|---|
| CaO (cr) | -635.09[1] | -604.03[1] | 39.75[1] | 42.80[1] |
| CaO (g) | – | – | – | – |
| MnO (cr) | -385.22[1] | -362.90[1] | 59.71[1] | 45.44[1] |
| MnO (g) | 124.22[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, (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°, -186.2 kJ · mol−1
- ^ ΔfG°, -147.2 kJ · mol−1
- ^ S°, 42. J · K−1 · mol−1
- ^ ΔfH°, -520.03 kJ · mol−1
- ^ ΔfG°, -465.14 kJ · mol−1
- ^ S°, 53.05 J · K−1 · mol−1
- ^ Cp°, 54.14 J · K−1 · mol−1
- ^ ΔfH°, -502.5 kJ · mol−1
- ^ ΔfH°, -635.09 kJ · mol−1
- ^ ΔfG°, -604.03 kJ · mol−1
- ^ S°, 39.75 J · K−1 · mol−1
- ^ Cp°, 42.80 J · K−1 · mol−1
- ^ ΔfH°, -385.22 kJ · mol−1
- ^ ΔfG°, -362.90 kJ · mol−1
- ^ S°, 59.71 J · K−1 · mol−1
- ^ Cp°, 45.44 J · K−1 · mol−1
- ^ ΔfH°, 124.22 kJ · 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