CSCI has a lattice energy of -657 kJ/mol. Consider a generic salt, AB, where A²+ has the same radius as Cs*, and B hasthe same radius as Cl. Estimate the lattice energy of the salt AB.lattice energy of AB:kJ/mol

Answered: CSCI has a lattice energy of -657…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

CSCI has a lattice energy of -657 kJ/mol. Consider a generic salt, AB, where A²+ has the same radius as Cs*, and B has
the same radius as Cl. Estimate the lattice energy of the salt AB.
lattice energy of AB:
kJ/mol

Expert Solution

Step 1 Introduction

Lattice energy is the energy required to dissociate the salt of type AB into the ions of A⁺ and B^-. In simple terms, the energy involved in the following reaction is known as lattice energy.

AB(s) $\to$ A⁺(g) + B^-(g)

The enthalpy change involved in the reaction depends on the ionization energy of A, the electron affinity of B, the enthalpy of sublimation, enthalpy of dissociation. If the size of the elements involved in two different compounds is the same, then the lattice energy of both the compounds will be similar.