What will be the final temperature of the solution in a coffee cup calorimeter if a 50.00 ml sample of .250 M HCl is added to a 50 ml sample of .250 NaOH. The initial temperature is 19.50 degrees C and the ΔHrxn is (-57.2) kJ/mol NaOH. ( assume the density of the solution is 1.00 g/ml and the specific heat of the solution is 4.18 J/gxC)