Claculate the molar heat of solution,it deltaH for the process?

Question

When 5.00g of NaOH(s) are added to 100g of water at 25.1 C in a calorimeter also at 25.1 C, the temperature rises from 25.0 to 37.5 C. calculate the molar heat of solution,
NaOH(s)--->Na(aq)+OH(aq). Assume specific heat capacity of water is 4.18J/gK and that of the NaOH(aq) solution is the same.

Answer 1

100 x 4.2 x 12.5 x 40/5