What is the value of electron gain enthalpy of Na^+ if IE_1 of Na… - Vidyadip

MCQ

What is the value of electron gain enthalpy of $Na^+$ if $IE_1$ of $Na \ 5.1\ eV$ ? .......... $\mathrm{eV}$

✓
$-5.1$
B
$-10.2$
C
$+2.55$
D
$+10.2$

✓

Answer

Correct option: A.

$-5.1$

a
$M \stackrel{}{\longrightarrow} M^{+}+e^{-}\;\;\; I E_{1}=5.1 e V$

$\mathrm{M}^{+}+\mathrm{e}^{-} \longrightarrow \mathrm{M}\;\;\;\; \Delta \mathrm{H}_{\mathrm{cg}}=-5.1 \mathrm{eV}$

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