You-iggy
  1. Home
  2. Chemical reactions
  3. 2Hg + O2 → 2HgO

2Hg + O2 → 2HgO

Last updated:
Reaction of mercury and oxygen
2HgMercury + O2Oxygen
⟶
2HgOMercury(II) oxide

The reaction of mercury and oxygen yields mercury(II) oxide. 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 categories

Reaction data

Chemical equation

Reaction of mercury and oxygen
2HgMercury + O2Oxygen
⟶
2HgOMercury(II) oxide

General equation

Reaction of oxidizable species and oxidizing species
Oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent
⟶
ProductOxidation product + ProductReduction product
Reaction of metal and nonmetal
MetalReducing agent + NonmetalOxidizing agent
⟶
Binary compoundOxidation reduction product

Oxidation state of each atom

Reaction of mercury and oxygen

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
HgMercury2
Reducing
Oxidizable
Metal
O2Oxygen1
Oxidizing
Oxidizing
Nonmetal

Products

Chemical formulaNameCoefficientTypeType in general
equation
HgOMercury(II) oxide2
Redoxed product
–
Binary compound

Thermodynamic changes

Changes in standard condition (1)

Reaction of mercury and oxygen
◆
ΔrG−117.078 kJ/mol
K3.24 × 1020
pK−20.51
2HgLiquid + O2Gas
⟶
2HgOCrystalline solidred, orthorhombic
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
−181.66−117.078−216.602.80
per 1 mol of
−90.830−58.5390−108.301.40
per 1 mol of
−181.66−117.078−216.602.80
per 1 mol of
−90.830−58.5390−108.301.40

Changes in standard condition (2)

Reaction of mercury and oxygen
◆
ΔrG−116.818 kJ/mol
K2.92 × 1020
pK−20.47
2HgLiquid + O2Gas
⟶
2HgOCrystalline solidyellow
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
−180.92−116.818−215.0–
per 1 mol of
−90.460−58.4090−107.5–
per 1 mol of
−180.92−116.818−215.0–
per 1 mol of
−90.460−58.4090−107.5–

Changes in standard condition (3)

Reaction of mercury and oxygen
◆
ΔrG−116.44 kJ/mol
K2.51 × 1020
pK−20.40
2HgLiquid + O2Gas
⟶
2HgOCrystalline solidhexagonal
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
−179.0−116.44−210.0–
per 1 mol of
−89.50−58.220−105.0–
per 1 mol of
−179.0−116.44−210.0–
per 1 mol of
−89.50−58.220−105.0–

Changes in aqueous solution

Reaction of mercury and oxygen
◆
ΔrG−212.1 kJ/mol
K1.44 × 1037
pK−37.16
2HgUn-ionized aqueous solution + O2Un-ionized aqueous solution
⟶
2HgOCrystalline solidred, orthorhombic
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
−245.4−212.1−112–
per 1 mol of
−122.7−106.0−56.0–
per 1 mol of
−245.4−212.1−112–
per 1 mol of
−122.7−106.0−56.0–

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
Hg (cr)––––
Hg (l)0[1]0[1]76.02[1]27.983[1]
Hg (g)61.317[1]31.820[1]174.96[1]20.786[1]
Hg (ao)37.7[1]39.3[1]71[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, (l):Liquid, (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
HgO (cr)
red, orthorhombic
-90.83[1]-58.539[1]70.29[1]44.06[1]
HgO (cr)
yellow
-90.46[1]-58.409[1]71.1[1]–
HgO (cr)
hexagonal
-89.5[1]-58.22[1]73.6[1]–
HgO (g)––241.9[1]34.10[1]
* (cr):Crystalline solid, (g):Gas

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)