Question

2.4 Calculate the cohesive energy per ion-pair of LiCl and KCl crystals using the following data: LiCl KCl Madelung constant 1.748 1.748 Li+ - Cl-/K+-Cl- spacing 2.57 Å 3.14 Å Ionization energy of 5.4 eV 4.34 eV Li/K Assume that the repulsive potential energy is negligibly small.

          2.4 Calculate the cohesive energy per ion-pair of LiCl and KCl crystals using the following
data:

LiCl KCl
Madelung constant 1.748 1.748
Li+ - Cl-/K+-Cl- spacing 2.57 Å 3.14 Å
Ionization energy of 5.4 eV 4.34 eV
Li/K

Assume that the repulsive potential energy is negligibly small.

2.4 Calculate the cohesive energy per ion-pair of LiCl and KCl crystals using the following
data:

LiCl KCl
Madelung constant 1.748 1.748
Li+ - Cl-/K+-Cl- spacing 2.57 Å 3.14 Å
Ionization energy of 5.4 eV 4.34 eV
Li/K

Assume that the repulsive potential energy is negligibly small.

Added by Michael L.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Hafiz Shahzaib

03/02/2022

Step 1

The formula for this is: E = - (Madelung constant * e^2) / (4πε0 * r) where e is the charge of an electron (1.6 x 10^-19 C), ε0 is the permittivity of free space (8.85 x 10^-12 C^2/Nm^2), and r is the ion spacing. For LiCl: E = - (1.748 * (1.6 x 10^-19 C)^2) / Show more…

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2.4 Calculate the cohesive energy per ion-pair of LiCl and KCl crystals using the following data: LiCl KCl Madelung constant 1.748 1.748 Li+ - Cl-/K+ - Cl- spacing 2.57 Å 3.14 Å Ionization energy of Li/K 5.4 eV 4.34 eV Assume that the repulsive potential energy is negligibly small.