$3\mathrm{.}50$g of solid NaOH is dissolved in $50\mathrm{.}00$ mL of water in a cup calorimeter. The water in the calorimeter is initially at $19\mathrm{.}5\backslash$deg C then increases to $27\mathrm{.}0\backslash$deg C with the complete dissolution of the NaOH. What is the enthalpy of reaction $($Hrxn$)$ in kJ$/$mol of this dissolution? Note: you will need to utilize the posted Table of Water Densities. Report the value $($to $1$ decimal place$)$ only; DO NOT include units.