We mix 2.5mL of NaOH 0.5M with 2.5mL of HCl 0.5M both at 25◦C in a constant-pressure calorimeter. The heat of reaction is -40KJ/mol. Calculate the final temperature inside the calorimeter, if the solution density is 1g/mL and the specific heat of the solution is 4.184J/g ◦C.