Question

consider the following data for iodine:

electronegativity	2.66
electron affinity	295.2 $\frac{kj}{mol}$
ionization energy	1008.4 $\frac{kj}{mol}$
heat of fusion	7.76 $\frac{kj}{mol}$

you may find additional useful data in the aleks data tab.
does the following reaction absorb or release energy? (1) i(g)→i+(g)+e− release absorb cant be decided with the data given.
is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? yes no
if you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): 1008.4 kj/mol
does the following reaction absorb or release energy? (2) i+(g)+e−→i(g) release absorb cant be decided with the data given.
is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? yes no
if you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): kj/mol
try one last time
recheck

Explanation:

Step1: Analyze reaction (1)

The reaction \(I(g)\to I^{+}(g)+e^{-}\) is an ionization process. Ionization energy is the energy required to remove an electron from a gaseous atom or ion. Given the ionization - energy of iodine is \(1008.4\ kJ/mol\), so this reaction absorbs energy.

Step2: Analyze reaction (2)

The reaction \(I^{+}(g)+e^{-}\to I(g)\) is the reverse of the ionization process. The energy change for this reaction is the opposite of the ionization energy. Since the ionization energy of iodine is \(1008.4\ kJ/mol\), the energy released in this reaction is \(1008.4\ kJ/mol\).

Answer:

For reaction (1): absorb, yes, \(1008.4\ kJ/mol\)
For reaction (2): release, yes, \(1008.4\ kJ/mol\)