Midterm 2 - Question 1 | General Chemistry 2

When a 14.50 g of potassium chlorate is dissolved in 200.0 mL of water in a vacuum flask, the temperature falls from 25.0°C to 19.0°C. The heat capacity of the solution is 4.184 J.g-1.°C-1.

What is the enthalpy change ΔHdiss (in kJ.mol-1) for the dissolution of KClO3 in water?