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  3. 7Ba(HCO3)2 + 24e^− → 7BaO + 2OH^− + 11CO3^2− + 3CH4↑

7Ba(HCO3)2 + 24e− → 7BaO + 2OH− + 11CO32− + 3CH4↑

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Reduction of barium hydrogencarbonate
7Ba(HCO3)2Barium hydrogencarbonate + 24e−Electron
⟶
7BaOBarium oxide + 2OH−Hydroxide ion + 11CO32−Carbonate ion + 3CH4↑Methane

Reduction of barium hydrogencarbonate yields barium oxide, hydroxide ion, carbonate ion, and methane (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:

Table of contents
  1. 1Reaction data
  2. 2Thermodynamic changes
  3. 3References
  4. 4Related reactions
  5. 5Related categories

Reaction data

Chemical equation

Reduction of barium hydrogencarbonate
7Ba(HCO3)2Barium hydrogencarbonate + 24e−Electron
⟶
7BaOBarium oxide + 2OH−Hydroxide ion + 11CO32−Carbonate ion + 3CH4↑Methane

General equation

Reduction of reducible species
ReactantOxidizing agent + e−
⟶
ProductReduction product

Oxidation state of each atom

Reduction of barium hydrogencarbonate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Ba(HCO3)2Barium hydrogencarbonate7
Oxidizing
–
e−Electron24
–
Electron

Products

Chemical formulaNameCoefficientTypeType in general
equation
BaOBarium oxide7
–
–
OH−Hydroxide ion2
–
–
CO32−Carbonate ion11
–
–
CH4Methane3
Reduced
–

Thermodynamic changes

Changes in standard condition (1)

Reduction of barium hydrogencarbonate
◆
ΔrG2191.8 kJ/mol
K0.10 × 10−383
pK383.99
7Ba(HCO3)2Ionized aqueous solution + 24e−
⟶
7BaOCrystalline solid + 2OH−Un-ionized aqueous solution + 11CO32−Un-ionized aqueous solution + 3CH4↑Gas
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
1444.02191.8−939.7–
206.29313.11−134.2–
per 1 mol of
Electron
60.16791.325−39.15–
per 1 mol of
206.29313.11−134.2–
per 1 mol of
Hydroxide ion
722.001095.9−469.9–
per 1 mol of
Carbonate ion
131.27199.25−85.43–
per 1 mol of
481.33730.60−313.2–

Changes in standard condition (2)

Reduction of barium hydrogencarbonate
◆
ΔrG2241.0 kJ/mol
K0.25 × 10−392
pK392.61
7Ba(HCO3)2Ionized aqueous solution + 24e−
⟶
7BaOCrystalline solid + 2OH−Un-ionized aqueous solution + 11CO32−Un-ionized aqueous solution + 3CH4↑Un-ionized aqueous solution
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
1401.32241.0−1247.4–
200.19320.14−178.20–
per 1 mol of
Electron
58.38793.375−51.975–
per 1 mol of
200.19320.14−178.20–
per 1 mol of
Hydroxide ion
700.651120.5−623.70–
per 1 mol of
Carbonate ion
127.39203.73−113.40–
per 1 mol of
467.10747.00−415.80–

Thermodynamic data of reactants

Chemical formulaStandard 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
Ba(HCO3)2 (ai)-1921.63[1]-1734.30[1]192.0[1]–
e−––––
* (ai):Ionized aqueous solution

Thermodynamic data of products

Chemical formulaStandard 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
BaO (cr)-553.5[1]-525.1[1]70.42[1]47.78[1]
BaO (g)-117[1]––33.1[1]
OH− (g)-143.5[1]–––
OH− (ao)-229.994[1]-157.244[1]-10.75[1]-148.5[1]
CO32− (ao)-677.14[1]-527.81[1]-56.9[1]–
CH4 (g)-74.81[1]-50.72[1]186.264[1]35.309[1]
CH4 (ao)-89.04[1]-34.33[1]83.7[1]–
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)