Chapter 6, Problem 6.98CP

Interpretation Introduction

Interpretation:

Construct a Born-Haber cycle to calculate the lattice energy of $CrC{l}_{2}I\left(s\right)$ based on the following information:

$NetenergychangefortheformationofCrC{l}_{2}I\left(s\right)=\text{ - 420 }kJ/mol$

$BonddissociationenergyforC{l}_2\left(g\right)=+\text{ 243 }kJ/mol$

$Bonddissociationenergyfor{I}_2\left(g\right)=+\text{ 151 }kJ/mol$

$Heatofsublimationfor{I}_2\left(s\right)=+\text{ 62 }kJ/mol$

$HeatofsublimationforCr\left(s\right)=+\text{ 397 }kJ/mol$

$E_{i1}forCr\left(g\right)=\text{ + 652 }kJ/mol$

$E_{i2}forCr\left(g\right)=\text{ + 1588 }kJ/mol$

$E_{i3}forCr\left(g\right)=\text{ + 2882 }kJ/mol$

$E_{ea}forCl\left(g\right)=\text{ - 349 }kJ/mol$

$E_{ea}forI\left(g\right)=\text{ - 295 }kJ/mol$

Concept Introduction:

Electron affinity is defined as amount of energy spent when negative ion is formed by adding an electron to a neutral atom