In a constant pressure calorimeter with heat capacity of  $450J{K}^{-1}$, 200 ml of 0.9 M HCl  and 200 ml of 0.45 M  $Ba{\left(OH\right)}_2$ are mixed. The density of  final solution is ${\text{1gm\hspace{0.17em}\hspace{0.17em}ml}}^{\text{-1}}$   .  Initially, both solutions are at ${21}^{\circ }C$ . Select correct statement  $[Given:\Delta H_{Neutralization}^{\circ }=-56.2kJmo{l}^{-1}]$
Specific heat of $H_{2}O=4.184Jg{m}^{-1}$  .