Which step(s) is/are endothermic in the Born–Haber cycle for the formation of ?

CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

Which step(s) is/are endothermic in the Born–Haber cycle for the formation of

\text{LiCl}

? (1)

\frac{1}{2}\text{Cl}_2(\text{g})\rightarrow\text{Cl}(\text{g})

and

\text{Li}(\text{s})\rightarrow\text{Li}(\text{g})

(2)

\text{Cl}(\text{g})+\text{e}^-\rightarrow\text{Cl}^-(\text{g})

and

\text{Li}(\text{g})\rightarrow\text{Li}^+(\text{g})+\text{e}^-

(3)

\text{Li}^+(\text{g})+\text{Cl}^-(\text{g})\rightarrow\text{LiCl}(\text{s})

(4)

\frac{1}{2}\text{Cl}_2(\text{g})\rightarrow\text{Cl}(\text{g})

and

\text{Cl}(\text{g})+\text{e}^-\rightarrow\text{Cl}^-(\text{g})