In which of the following processes is the least energy required?
- A$F_{(g)}^{-} \to F_{(g)} + e^{\Theta}$
- B$P_{(g)}^{-} \to P_{(g)} + e^{\Theta}$
- C$S_{(g)}^{-} \to S_{(g)} + e^{\Theta}$
- D$Cl_{(g)}^{-} \to Cl_{(g)} + e^{\Theta}$
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Which of the following species has the highest electron affinity?
Easy
View SolutionWhich of the following statements is correct?
Medium
View SolutionThe formation of oxide ion $O^{2-}$ from oxygen atom requires an exothermic reaction,followed by an endothermic step as shown below. The process of formation of $O^{2-}$ in gas phase is unfavorable $(\Delta H^{\ominus} = +ve)$,even though it has the stable configuration of the nearest noble gas neon. This is because:
$O_{(g)} + e^{-} \longrightarrow O^{-}_{(g)} ; \Delta H^{\ominus} = -141 \ kJ \ mol^{-1}$
$O^{-}_{(g)} + e^{-} \longrightarrow O^{2-}_{(g)} ; \Delta H^{\ominus} = +760 \ kJ \ mol^{-1}$
$O_{(g)} + e^{-} \longrightarrow O^{-}_{(g)} ; \Delta H^{\ominus} = -141 \ kJ \ mol^{-1}$
$O^{-}_{(g)} + e^{-} \longrightarrow O^{2-}_{(g)} ; \Delta H^{\ominus} = +760 \ kJ \ mol^{-1}$
What is electron affinity?
Easy
View SolutionWhat is electron gain enthalpy $\left( \Delta_{eg} H \right)$? When does its value become positive and negative?
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