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2NH4Cl + 4O2 → 2NO2 + Cl2 + 4H2O

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Reaction of ammonium chloride and oxygen
2NH4ClAmmonium chloride + 4O2Oxygen
⟶
2NO2Nitrogen dioxide + Cl2Chlorine + 4H2OWater

The reaction of ammonium chloride and oxygen yields nitrogen dioxide, chlorine, and water (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 ammonium chloride and oxygen
2NH4ClAmmonium chloride + 4O2Oxygen
⟶
2NO2Nitrogen dioxide + Cl2Chlorine + 4H2OWater

General equation

Reaction of reducing species and oxidizing species
Reducing speciesReducing agent + Oxidizing speciesOxidizing agent
⟶
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of ammonium chloride and oxygen

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NH4ClAmmonium chloride2
Reducing
Reducing
O2Oxygen4
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
NO2Nitrogen dioxide2
Redoxed product
–
Cl2Chlorine1
Oxidized
–
H2OWater4
Reduced
–

Thermodynamic changes

Changes in standard condition

Reaction of ammonium chloride and oxygen
◆
ΔrG−440.16 kJ/mol
K1.30 × 1077
pK−77.11
2NH4ClCrystalline solid + 4O2Gas
⟶
2NO2Gas + Cl2Gas + 4H2OLiquid
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
−448.10−440.16−26.9123.9
per 1 mol of
−224.05−220.08−13.461.95
per 1 mol of
−112.03−110.04−6.7230.98
per 1 mol of
−224.05−220.08−13.461.95
per 1 mol of
−448.10−440.16−26.9123.9
per 1 mol of
−112.03−110.04−6.7230.98

Changes in aqueous solution (1)

Reaction of ammonium chloride and oxygen
◆
ΔrG−490.5 kJ/mol
K8.55 × 1085
pK−85.93
2NH4ClIonized aqueous solution + 4O2Un-ionized aqueous solution
⟶
2NO2Gas + Cl2Gas + 4H2OLiquid
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
−430.8−490.5199.4–
per 1 mol of
−215.4−245.399.70–
per 1 mol of
−107.7−122.649.85–
per 1 mol of
−215.4−245.399.70–
per 1 mol of
−430.8−490.5199.4–
per 1 mol of
−107.7−122.649.85–

Changes in aqueous solution (2)

Reaction of ammonium chloride and oxygen
◆
ΔrG−483.5 kJ/mol
K5.08 × 1084
pK−84.71
2NH4ClIonized aqueous solution + 4O2Un-ionized aqueous solution
⟶
2NO2Gas + Cl2Un-ionized aqueous solution + 4H2OLiquid
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
−454.2−483.597–
per 1 mol of
−227.1−241.849–
per 1 mol of
−113.5−120.924–
per 1 mol of
−227.1−241.849–
per 1 mol of
−454.2−483.597–
per 1 mol of
−113.5−120.924–

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
NH4Cl (cr)-314.43[1]-202.87[1]94.6[1]84.1[1]
NH4Cl (ai)-299.66[1]-210.52[1]169.9[1]-56.5[1]
O2 (g)0[1]0[1]205.138[1]29.355[1]
O2 (ao)-11.7[1]16.4[1]110.9[1]–
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (ao):Un-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
NO2 (g)33.18[1]51.31[1]240.06[1]37.20[1]
Cl2 (g)0[1]0[1]223.066[1]33.907[1]
Cl2 (ao)-23.4[1]6.94[1]121[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]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (l):Liquid

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)