Chapter 13, Problem 128AE

Interpretation Introduction

Interpretation: The value of ${\text{ΔH}}_{\text{f}}^{\text{0}}$ for the barium bromide with the given data needs to be determined.

  ${\text{Ba}}_{\text{(s) }}{\text{+ Br}}_{\text{2(g) }}\stackrel{}{\to }{\text{BaBr}}_{\text{2}}{}_{\text{(s)}}$

Concept Introduction:

Lattice energy can be defined as the energy released if the component ions were brought together from infinity to form the compound or the energy required to break the compound in to its respective ions. Lattice energy can be calculate with the help of Born-Heber cycle. It involves the use of different energies such as heat of formation, atomization, dissociation energy etc.

  ${\text{ΔH}}_{\text{f}}^{\text{0}}{\text{= ΔH}}_{\text{sub}}^{\text{0}}{\text{+ ΔH}}_{\text{diss}}^{\text{0}}\text{+}\left(\text{IE}\right)\text{+ }\left(\text{EA}\right)\text{+Lattice energy}$