What is the value of electron gain enthalpy of $\mathrm{Na}^{+}$if $\mathrm{IE}_1$ of $\mathrm{Na}=5.1…

What is the value of electron gain enthalpy of $\mathrm{Na}^{+}$if $\mathrm{IE}_1$ of $\mathrm{Na}=5.1 \mathrm{eV}$ ?
  1. $-5.1 \mathrm{eV}$
  2. $-10.2 \mathrm{eV}$
  3. $+2.55 \mathrm{eV}$
  4. $+10.2 \mathrm{eV}$

Solution

$\mathrm{IE}_1$ of $\mathrm{Na}=-$ Electron gain enthalpy of $\mathrm{Na}^{+}$ion $=-5.1 \mathrm{eV}$.

Asked in: NEET 2011 (Mains)

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