Year 12s: what will be the first way you research your future options? >>

Endothermic reaction with more water mixing with ammonium nitrate - what happens?

We are doing an experiment to see how water mixing with ammonium nitrate will affect the temperature of the solution, as more water is added every attempt but the amount of ammonium nitrate will stay the same.
So, since it is an endothermic reaction that is used in instant ice packs, can we expect the temperature of the solution to get colder as more water is added, or stay the same, and why?
One teacher said it would get colder with more water, the other said it would stay the same with more water... :/
Please explain what the expected outcome would be, and why :biggrin: