MCQ
For which of the following reaction $\Delta \,H^o$ value is equal to the first ionization energy of $Ca$ is ?
- A$Ca^+(g) \to Ca^{2+} (g) + e$
- ✓$Ca(g) \to Ca^+ (g) + e$
- C$Ca(s) \to Ca^+ (g) + e$
- D$Ca(g) \to Ca^{2+} (g) + 2e$
✓
Answer
Correct option: B.
$Ca(g) \to Ca^+ (g) + e$
b
The First ionization energy of an atom or moleciule is the energy required to remove an electron from isolated gaseous atoms or ions.
The First ionization energy of an atom or moleciule is the energy required to remove an electron from isolated gaseous atoms or ions.
so, the $\Delta H^{\circ}$ value is equal to the first ionization energy of $Ca$ is $Ca( g ) \longrightarrow Ca ^{+}( g )+e^{-}$
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