Enthalpy of neutralization.

Using 20.0 mL each of 1.0M HCl and 1.0 M NaOH to perform this reaction. Compute the enthalpy change (J/mole) for the reaction of acid (or base) neutralized. Assume that both the HCl and NaOH solutions have a density of 1.0 g/mL and that the specific heat of the salt solution formed is 4.18 J/g∙ºC.  When the solutions are mixed, the temperature of the mixture increases from 23.9oC to 28.7oC.   Show all work for possible partial credit.