In the Born-Haber cycle for the formation of | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The Born-Haber cycle relates the standard enthalpy of formation $(\Delta H_f^\circ)$ of an ionic compound to its constituent elements' properties.

Vedclass · Accepted Answer

the lattice energy

Vedclass · Answer

(D) The Born-Haber cycle relates the standard enthalpy of formation $(\Delta H_f^\circ)$ of an ionic compound to its constituent elements' properties.The equation is: $\Delta H_f^\circ = \Delta H_{sub} + IE + \Delta H_{diss} + EA + U$Using the values from the cycle:$\Delta H_{sub} = +108 \ kJ/mol$$IE = +496 \ kJ/mol$$\Delta H_{diss} = +122 \ kJ/mol$$EA = -349 \ kJ/mol$$U = -788 \ kJ/mol$Comparing the absolute magnitudes of these energy terms,the lattice energy $(U = -788 \ kJ/mol)$ is the largest in magnitude. This large negative value is the primary driving force for the formation and stability of the solid ionic lattice.

In the Born-Haber cycle for the formation of solid common salt $(NaCl)$,the largest contribution to the stability of the crystal lattice comes from:

Similar Questions

The correct statement for the molecule,$CsI_3$ is:

The correct order of melting points of the following salts is $LiF$ $(I)$,$LiCl$ $(II)$,$LiI$ $(III)$.

Which of the following factors does not favor the formation of an electrovalent (ionic) bond?

The atomic numbers of the elements $X, Y, Z$ are $a, a+1, a+2$ respectively. $Z$ is an alkali metal. The nature of bonding in the compound formed by $X$ and $Z$ is

The lattice energy of the lithium halides is in the following order:

Vedclass Test Series

Exam Paper Generator

Online Exam Module