(2)NaOH solution constituted by 0.200 mol NaOH in 200.0 g HO (1m NaOH) weighing 217.0 g with specific heat 3.80 j/c;(3) a reaction vessel and attachments with heat capacity 5 J/C (I measured the heat capacity of the styrofoam cups, plastic bags and stirring bars in a separate experiment.)