Question

In the transformation, $Na\left(s\right)\to N{a}^{+}\left(g\right)$, the energies involved are:

• A. Ionization energy
• B. Sublimation energy
• C. Ionization energy and sublimation energy
• D. Bond dissociation energy

Answer 1

The correct option is C Ionization energy and sublimation energy

$Na\left(s\right)\stackrel{Sublimation}{\to }Na\left(g\right)\stackrel{I.E}{\to }N{a}^{+}\left(g\right)$
First $Na\left(s\right)$ is converted into $Na\left(g\right)$. Energy required to convert a solid into gas is known as sublimation energy. After converting into gas it is changed into $N{a}^{+}\left(g\right)$. Energy required to remove most loosely bound electron from an isolated neutral gaseous atom is known as ionisation energy.