You-iggy

HgS + I2 → HgI2 + S

The reaction of mercury(II) sulfide and iodine yields mercury(II) iodide and sulfur. 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

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 mercury(II) sulfide and iodine

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
HgSMercury(II) sulfide1
Reducing
Reducing
I2Iodine1
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
HgI2Mercury(II) iodide1
Reduced
SSulfur1
Oxidized

Thermodynamic changes

Changes in standard condition (1)

Reaction of mercury(II) sulfide and iodine
ΔrG−51.1 kJ/mol
K8.96 × 108
pK−8.95
HgSCrystalline solidred + I2Crystalline solid
HgI2Crystalline solidred + SCrystalline solidrhombic
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
−47.2−51.113
−47.2−51.113
per 1 mol of
−47.2−51.113
per 1 mol of
−47.2−51.113
per 1 mol of
−47.2−51.113

Changes in standard condition (2)

Reaction of mercury(II) sulfide and iodine
HgSCrystalline solidred + I2Crystalline solid
HgI2Crystalline solidred + SCrystalline solidmonoclinic
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
−46.9
−46.9
per 1 mol of
−46.9
per 1 mol of
−46.9
per 1 mol of
−46.9

Changes in standard condition (3)

Reaction of mercury(II) sulfide and iodine
HgSCrystalline solidred + I2Crystalline solid
HgI2Crystalline solidyellow + SCrystalline solidrhombic
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
−44.7
−44.7
per 1 mol of
−44.7
per 1 mol of
−44.7
per 1 mol of
−44.7

Changes in standard condition (4)

Reaction of mercury(II) sulfide and iodine
HgSCrystalline solidred + I2Crystalline solid
HgI2Crystalline solidyellow + SCrystalline solidmonoclinic
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
−44.4
−44.4
per 1 mol of
−44.4
per 1 mol of
−44.4
per 1 mol of
−44.4

Changes in standard condition (5)

Reaction of mercury(II) sulfide and iodine
ΔrG−54.0 kJ/mol
K2.89 × 109
pK−9.46
HgSCrystalline solidblack + I2Crystalline solid
HgI2Crystalline solidred + SCrystalline solidrhombic
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
−51.8−54.07
−51.8−54.07
per 1 mol of
−51.8−54.07
per 1 mol of
−51.8−54.07
per 1 mol of
−51.8−54.07

Changes in standard condition (6)

Reaction of mercury(II) sulfide and iodine
HgSCrystalline solidblack + I2Crystalline solid
HgI2Crystalline solidred + SCrystalline solidmonoclinic
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
−51.5
−51.5
per 1 mol of
−51.5
per 1 mol of
−51.5
per 1 mol of
−51.5

Changes in standard condition (7)

Reaction of mercury(II) sulfide and iodine
HgSCrystalline solidblack + I2Crystalline solid
HgI2Crystalline solidyellow + SCrystalline solidrhombic
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
−49.3
−49.3
per 1 mol of
−49.3
per 1 mol of
−49.3
per 1 mol of
−49.3

Changes in standard condition (8)

Reaction of mercury(II) sulfide and iodine
HgSCrystalline solidblack + I2Crystalline solid
HgI2Crystalline solidyellow + SCrystalline solidmonoclinic
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
−49.0
−49.0
per 1 mol of
−49.0
per 1 mol of
−49.0
per 1 mol of
−49.0

Changes in aqueous solution

Reaction of mercury(II) sulfide and iodine
ΔrG−41.1 kJ/mol
K1.59 × 107
pK−7.20
HgSCrystalline solidred + I2Un-ionized aqueous solution
HgI2Un-ionized aqueous solution + SCrystalline solidrhombic
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
−43.9−41.1−12
−43.9−41.1−12
per 1 mol of
−43.9−41.1−12
per 1 mol of
−43.9−41.1−12
per 1 mol of
−43.9−41.1−12

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
HgS (cr)
red
-58.2[1]-50.6[1]82.4[1]48.41[1]
HgS (cr)
black
-53.6[1]-47.7[1]88.3[1]
HgS (g)254.75[1]
I2 (cr)0[1]0[1]116.135[1]54.438[1]
I2 (g)62.438[1]19.327[1]260.69[1]36.90[1]
I2 (ao)22.6[1]16.40[1]137.2[1]
* (cr):Crystalline solid, (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
HgI2 (cr)
red
-105.4[1]-101.7[1]180[1]
HgI2 (cr)
yellow
-102.9[1]
HgI2 (g)-17.2[1]-59.9[1]336.13[1]61.09[1]
HgI2 (ao)-79.5[1]-75.3[1]176[1]
S (cr)
rhombic
0[1]0[1]31.80[1]22.64[1]
S (cr)
monoclinic
0.33[1]
S (g)278.805[1]238.250[1]167.821[1]23.673[1]
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1