The oxidising power of chlorine in an aqueous solution can be determined by the parameters indicated below:
$\frac{1}{2} Cl_{2(g)} \xrightarrow{\frac{1}{2} \Delta_{diss} H^{\Theta}} Cl_{(g)} \xrightarrow{\Delta_{eg} H^{\Theta}} Cl^{-}_{(g)} \xrightarrow{\Delta_{Hyd} H^{\Theta}} Cl^{-}_{(aq)}$
(Using the data: $\Delta_{diss} H_{Cl_2}^{\Theta} = 240 \ kJ \ mol^{-1}$, $\Delta_{eg} H_{Cl}^{\Theta} = -349 \ kJ \ mol^{-1}$, $\Delta_{Hyd} H_{Cl}^{\Theta} = -381 \ kJ \ mol^{-1}$), the total enthalpy change $\Delta H$ will be ............. $kJ \ mol^{-1}$.

• A
  $+ 152$
• B
  $- 610$
• C
  $- 850$
• D
  $+ 120$