question_answer

\[{{H}_{2}}(g)+C{{l}_{2}}(g)\,\,\to \,\,2HCl(g)\,.\,\Delta H=-44kcal\] \[2Na(s)+2HCl(g)\,\,\to \,\,2NaCl(s)+{{H}_{2}}(g),\]\[\Delta H=-152\,kcal\] For the reaction \[Na(s)+\frac{1}{2}C{{l}_{2}}(g)\,\,\to \,\,NaCl(s),\,\Delta H=\] [KCET 2000]

A)                 ? 108 kcal           

B)                 ? 196 kcal

C)                 ? 98 kcal              

D)                 54 kcal