Calculate the lattice energy of kcl(s) given the following data using the born-haber cycle: δhsublimation k = 79.2 kj/mol ie1 k = 418.7 kj/mol bond energycl–cl = 242.8 kj/mol eacl = 348 kj/mol δhkcl(s) = –435.7 kj/mol

Explanation:

  The following equation relates to Born-Haber cycle

Where

is enthalpy of formation

S is enthalpy of sublimation

B is bond enthalpy

is ionisation enthalpy of metal

is electron affinity of non metal atom

is lattice energy

Substituting the given values we have

-435.7 = 79.2 + 1/2 x 242.8 + 418.7 - 348 +U_L

= - 707 KJ / mol

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.