Peroxides will react to release oxygen when added to water. By how much would the water temperature change if $7\mathrm{.}800g$ of sodium peroxide, $),$ is added to $110\mathrm{.}00mL$ of water?

$2Na2O2(s)+2H2O(l)4$NaOH$(aq)+O2(g),Ho=-285\mathrm{.}0kJ$