Pregunta 4 · Química I URV 2019

Pregunta 4 (1 point). Energetics of Ion Formation and Reaction Enthalpy

Use ionization energies and electron affinities listed below to determine whether the following reaction is endothermic or exothermic:

$$\mathrm{Mg}(g) + 2\,\mathrm{F}(g) \longrightarrow \mathrm{Mg}^{2+}(g) + 2\,\mathrm{F}^-(g)$$

Property (kJ/mol) · Mg · F

First ionization energy ($IE_1$) · 738 · 1681

Second ionization energy ($IE_2$) · 1451 · 3374

Electron affinity ($EA$) · 40 · $-328$

a)

b)

Endothermic

Exothermic