question_answer

Given

Reaction	Energy Change
\[Li(s)\to Li(g)\]	161
\[Li(g)\to L{{i}^{+}}(g)\]	520
\[\frac{1}{2}{{F}_{2}}(g)\to F(g)\]	77
\[F(g)+{{e}^{-}}\to {{F}^{-}}(g)\]	(Electron gain enthapy)
\[L{{i}^{+}}(g)+{{F}^{-}}(g)\to Li\,F(s)\]	-1047
\[Li(s)+\frac{1}{2}{{F}_{2}}(g)\to Li\,\,F(s)\]	-617

                 Based on data provided, find the value of electron gain enthalpy of fluorine.

Answer:

? 328