For which one of the processes represented by the following equations is the enthalpy (heat) change is likely to be nega…

\({\mathrm{Cl}}^{-}(\mathrm{g})+\mathrm{aq}\to {\mathrm{Cl}}^{-}(\mathrm{aq})\)

\(\mathrm{Cl}(\mathrm{g})\to {\mathrm{Cl}}^{+}(\mathrm{g})+{\mathrm{e}}^{-}\)

\(1/2{\mathrm{Cl}}_{2}(\mathrm{g})\to \mathrm{Cl}(\mathrm{g})\)

\({\mathrm{Cl}}_{2}(\mathrm{l})\to {\mathrm{Cl}}_{2}(\mathrm{g})\)