
Interpretation:
The energy change for the given reaction is to be calculated.
Concept introduction:
Ionization energy is the energy required when an electron is removed from a gaseous atom.

Answer to Problem 86AP
Solution:
(a)
(b)
(c)
(a)
Explanation of Solution
Given information: The reaction is as follows:
The given reaction is as follows:
In this reaction, lithium loses an electron whereas iodine gains an electron.
With reference tofigure
The ionization energy of lithium is
With reference tofigure
The electron affinity of iodine is
Add equations(1) and (2) as follows:
Therefore, the energy change for the reactionis
(b)
Given information: The reaction is as follows:
The given reaction is as follows:
In this reaction, sodium loses an electron whereas fluorine gains an electron.
With referencetofigure
The ionization energy of sodium is
With referencetofigure
The electron affinity of fluorine is
Add equation (3) and (4) as follows:
Therefore, the energy change for the reaction is
(c)
Given information: The reaction is as follows:
The given reaction is as follows:
In the above reaction, potassium loses an electron whereas chlorine gains an electron.
With referencetofigure
The ionization energy of lithium is
With referencetofigure
The electron affinity of iodine is
Add equations(5) and (6) as follows:
Therefore, the energy change for the reaction is
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Chapter 8 Solutions
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