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2Na + 2NH4Cl → 2NaCl + 2NH3↑ + H2

The reaction of sodium and ammonium chloride yields sodium chloride, ammonia, and hydrogen (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

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 sodium and ammonium chloride

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NaSodium2
Reducing
Reducing
NH4ClAmmonium chloride2
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
NaClSodium chloride2
Oxidized
NH3Ammonia2
H2Hydrogen1
Reduced

Thermodynamic changes

Changes in standard condition

Reaction of sodium and ammonium chloride
ΔrG−395.44 kJ/mol
K1.90 × 1069
pK−69.28
2NaCrystalline solid + 2NH4ClCrystalline solid
2NaClCrystalline solid + 2NH3Gas + H2Gas
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
−285.67−395.44368.2−24.7
per 1 mol of
−142.84−197.72184.1−12.3
per 1 mol of
−142.84−197.72184.1−12.3
per 1 mol of
−142.84−197.72184.1−12.3
per 1 mol of
−142.84−197.72184.1−12.3
per 1 mol of
−285.67−395.44368.2−24.7

Changes in aqueous solution (1)

Reaction of sodium and ammonium chloride
ΔrG−398.13 kJ/mol
K5.62 × 1069
pK−69.75
2NaCrystalline solid + 2NH4ClIonized aqueous solution
2NaClIonized aqueous solution + 2NH3Gas + H2Gas
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
−307.44−398.13304.4−24.5
per 1 mol of
−153.72−199.06152.2−12.3
per 1 mol of
−153.72−199.06152.2−12.3
per 1 mol of
−153.72−199.06152.2−12.3
per 1 mol of
−153.72−199.06152.2−12.3
per 1 mol of
−307.44−398.13304.4−24.5

Changes in aqueous solution (2)

Reaction of sodium and ammonium chloride
ΔrG−380.5 kJ/mol
K4.58 × 1066
pK−66.66
2NaCrystalline solid + 2NH4ClIonized aqueous solution
2NaClIonized aqueous solution + 2NH3Gas + H2Un-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
−311.6−380.5751
per 1 mol of
−155.8−190.3376
per 1 mol of
−155.8−190.3376
per 1 mol of
−155.8−190.3376
per 1 mol of
−155.8−190.3376
per 1 mol of
−311.6−380.5751

Changes in aqueous solution (3)

Reaction of sodium and ammonium chloride
ΔrG−418.23 kJ/mol
K1.87 × 1073
pK−73.27
2NaCrystalline solid + 2NH4ClIonized aqueous solution
2NaClIonized aqueous solution + 2NH3Un-ionized aqueous solution + H2Gas
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
−375.80−418.23142.1
per 1 mol of
−187.90−209.1271.05
per 1 mol of
−187.90−209.1271.05
per 1 mol of
−187.90−209.1271.05
per 1 mol of
−187.90−209.1271.05
per 1 mol of
−375.80−418.23142.1

Changes in aqueous solution (4)

Reaction of sodium and ammonium chloride
ΔrG−400.6 kJ/mol
K1.52 × 1070
pK−70.18
2NaCrystalline solid + 2NH4ClIonized aqueous solution
2NaClIonized aqueous solution + 2NH3Un-ionized aqueous solution + H2Un-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
−380.0−400.6588
per 1 mol of
−190.0−200.3294
per 1 mol of
−190.0−200.3294
per 1 mol of
−190.0−200.3294
per 1 mol of
−190.0−200.3294
per 1 mol of
−380.0−400.6588

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
Na (cr)0[1]0[1]51.21[1]28.24[1]
Na (g)107.32[1]76.761[1]153.712[1]20.786[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]
* (cr):Crystalline solid, (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
NaCl (cr)-411.153[1]-384.138[1]72.13[1]50.50[1]
NaCl (g)-176.65[1]-196.66[1]229.81[1]35.77[1]
NaCl (ai)-407.27[1]-393.133[1]115.5[1]-90.0[1]
NH3 (g)-46.11[1]-16.45[1]192.45[1]35.06[1]
NH3 (ao)-80.29[1]-26.50[1]111.3[1]
H2 (g)0[1]0[1]130.684[1]28.824[1]
H2 (ao)-4.2[1]17.6[1]577[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (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)