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4BCl3 + 6HNO3 → 2B2O3 + 3Cl2 + 6NO2 + 6HCl

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Reaction of boron trichloride and nitric acid
4BCl3Boron trichloride + 6HNO3Nitric acid
⟶
2B2O3Diboron trioxide + 3Cl2Chlorine + 6NO2Nitrogen dioxide + 6HClHydrogen chloride

The reaction of boron trichloride and nitric acid yields diboron trioxide, chlorine, nitrogen dioxide, and hydrogen chloride (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

Reaction of boron trichloride and nitric acid
4BCl3Boron trichloride + 6HNO3Nitric acid
⟶
2B2O3Diboron trioxide + 3Cl2Chlorine + 6NO2Nitrogen dioxide + 6HClHydrogen chloride

General equation

Reaction of hardly oxidizable species and oxidizing species
Hardly oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent
⟶
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of boron trichloride and nitric acid

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
BCl3Boron trichloride4
Reducing
Hardly oxidizable
HNO3Nitric acid6
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
B2O3Diboron trioxide2
–
–
Cl2Chlorine3
Oxidized
–
NO2Nitrogen dioxide6
Reduced
–
HClHydrogen chloride6
–
–

Thermodynamic changes

Changes in standard condition (1)

Reaction of boron trichloride and nitric acid
◆
ΔrG−612.09 kJ/mol
K1.71 × 10107
pK−107.23
4BCl3Gas + 6HNO3Liquid
⟶
2B2O3Crystalline solid + 3Cl2Gas + 6NO2Gas + 6HClGas
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
−240.66−612.091244.95−284.60
per 1 mol of
−60.165−153.02311.238−71.150
per 1 mol of
−40.110−102.02207.492−47.433
per 1 mol of
−120.33−306.05622.475−142.30
per 1 mol of
−80.220−204.03414.983−94.867
per 1 mol of
−40.110−102.02207.492−47.433
per 1 mol of
−40.110−102.02207.492−47.433

Changes in standard condition (2)

Reaction of boron trichloride and nitric acid
◆
ΔrG−589.4 kJ/mol
K1.81 × 10103
pK−103.26
4BCl3Gas + 6HNO3Liquid
⟶
2B2O3Amorphous solid + 3Cl2Gas + 6NO2Gas + 6HClGas
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
−204.18−589.41292.6−288.3
per 1 mol of
−51.045−147.3323.15−72.08
per 1 mol of
−34.030−98.23215.43−48.05
per 1 mol of
−102.09−294.7646.30−144.2
per 1 mol of
−68.060−196.5430.87−96.10
per 1 mol of
−34.030−98.23215.43−48.05
per 1 mol of
−34.030−98.23215.43−48.05

Changes in aqueous solution (1)

Reaction of boron trichloride and nitric acid
4BCl3Crystalline solid + 6HNO3Ionized aqueous solution
⟶
2B2O3Crystalline solid + 3Cl2Gas + 6NO2Gas + 6HClGas
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
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––

Changes in aqueous solution (2)

Reaction of boron trichloride and nitric acid
4BCl3Crystalline solid + 6HNO3Ionized aqueous solution
⟶
2B2O3Crystalline solid + 3Cl2Gas + 6NO2Gas + 6HClIonized 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
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––

Changes in aqueous solution (3)

Reaction of boron trichloride and nitric acid
4BCl3Crystalline solid + 6HNO3Ionized aqueous solution
⟶
2B2O3Crystalline solid + 3Cl2Un-ionized aqueous solution + 6NO2Gas + 6HClGas
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
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––

Changes in aqueous solution (4)

Reaction of boron trichloride and nitric acid
4BCl3Crystalline solid + 6HNO3Ionized aqueous solution
⟶
2B2O3Crystalline solid + 3Cl2Un-ionized aqueous solution + 6NO2Gas + 6HClIonized 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
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––
per 1 mol of
––––

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
BCl3 (cr)––––
BCl3 (l)-427.2[1]-387.4[1]206.3[1]106.7[1]
BCl3 (g)-403.76[1]-388.72[1]290.10[1]62.72[1]
HNO3 (l)-174.10[1]-80.71[1]155.60[1]109.87[1]
HNO3 (g)-135.06[1]-74.72[1]266.38[1]53.35[1]
HNO3 (ai)-207.36[1]-111.25[1]146.4[1]-86.6[1]
HNO3 (l)
1 hydrate
-473.46[1]-328.77[1]216.90[1]182.46[1]
HNO3 (l)
3 hydrate
-1056.04[1]-811.09[1]346.98[1]325.14[1]
* (cr):Crystalline solid, (l):Liquid, (g):Gas, (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
B2O3 (cr)-1272.77[1]-1193.65[1]53.97[1]62.93[1]
B2O3 (am)-1254.53[1]-1182.3[1]77.8[1]61.1[1]
B2O3 (g)-843.79[1]-831.97[1]279.81[1]66.86[1]
Cl2 (g)0[1]0[1]223.066[1]33.907[1]
Cl2 (ao)-23.4[1]6.94[1]121[1]–
NO2 (g)33.18[1]51.31[1]240.06[1]37.20[1]
HCl (g)-92.307[1]-95.299[1]186.908[1]29.12[1]
HCl (ai)-167.159[1]-131.228[1]56.5[1]-136.4[1]
* (cr):Crystalline solid, (am):Amorphous solid, (g):Gas, (ao):Un-ionized aqueous solution, (ai):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)