\[I{{E}_{1}}\] and \[I{{E}_{2}}\] of Mg are 178 and 348 kcal \[mo{{l}^{\,-\,1}}\]. The energy required for the reaction \[Mg\xrightarrow{{}}M{{g}^{2+}}+2\,\,{{e}^{-}}\] is

\[I{{E}_{1}}\] and \[I{{E}_{2}}\] of Mg are 178 and 348 kcal \[mo{{l}^

1.	\[I{{E}_{1}}\] and \[I{{E}_{2}}\] of Mg are 178 and 348 kcal \[mo{{l}^{\,-\,1}}\]. The energy required for the reaction \[Mg\xrightarrow{{}}M{{g}^{2+}}+2\,\,{{e}^{-}}\] is
A.	+170 kcal
B.	+526 kcal
C.	-170 kcal
D.	-526 kcal
Answer» C. -170 kcal

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\[I{{E}_{1}}\] and \[I{{E}_{2}}\] of Mg are 178 and 348 kcal \[mo{{l}^{\,-\,1}}\]. The energy required for the reaction \[Mg\xrightarrow{{}}M{{g}^{2+}}+2\,\,{{e}^{-}}\] is

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