Heat of Neutralization
Energy released by reaction = Energy absorbed by solution
Cs = q / [(mass) (Tfinal-Tinitial)] 
Net ionic equation for neutralization:

       H+(aq) + OH-(aq) ¨ H2O(l)
Specific heat capacity, Cs, is defined as the quantity of heat transferred, q, divided by the mass of the substance times the change in temperature.  A value of Cs is specific to the given substance.
q = Cs (mass) (Tfinal-Tinitial) 
This can then be rearranged to solve for the heat transferred.