When the first electron gain enthalpy ( ΔegH) of oxygen is -141 kJ/mol, its second electron gain enthalpy is :

Question

When the first electron gain enthalpy ( ΔegH) of oxygen is -141 kJ/mol, its second electron gain enthalpy is : (A) almost the same as that of the first (B) negative , but less negative than the first (C) a positive value (D) a more negative value than the first

Tardigrade Admin · Accepted Answer

Second electron gain enthalpy is always positive for every element. O- (g) + e- -> O-2 (g) ; Δ H = positive

Q. When the first electron gain enthalpy $(Δ_{e g} H)$ of oxygen is $- 141 k J / m o l$ , its second electron gain enthalpy is :

almost the same as that of the first

negative , but less negative than the first

a positive value

a more negative value than the first

Second electron gain enthalpy is always positive for every element.
$O^{-}_{(g)} + e^{-} - > O^{- 2}_{(g)}; Δ H =$ positive

Q. When the first electron gain enthalpy (Δeg​H) of oxygen is −141kJ/mol, its second electron gain enthalpy is :