question_answer

The lattice enthalpy of solid \[KCl\] is \[181\,kcal\,mo{{l}^{-1}}\]and the enthalpy of solution of \[KCl\] in \[{{H}_{2}}O\] is\[1.0\,\,kcal\,\,mo{{l}^{-1}}\]. If the hydration enthalpies of \[{{K}^{\oplus }}\] and \[C{{l}^{\Theta }}\] ions are in the ratio of \[2:1,\] then the enthalpy of hydration of \[{{K}^{\oplus }}\] is\[-20x\,K\,cal\,mo{{l}^{-1}}\].  Find the value of x.

Answer:

6