A solution containing 0.060 mol NaOH dissolved in 200 g water was treated with successive aliquots o — Thermochemistry Chemistry Question

A solution containing 0.060 mol NaOH dissolved in 200 g water was treated with successive aliquots of 6.0 M aqueous HCl in a well-insulated flask, and the temperature was measured after each aliquot to give the following data: The same experiment was repeated, again using 0.060 mol NaOH and 6.0 M aqueous HCl, but this time the NaOH was initially dissolved in 400 g water. Which graph represents the data obtained in this experiment?