I conducted an experiment in which I added Sodium Nitrate, Potassium Nitrate, Potassium Chloride, and Sodium Hydroxide - all separately into water - then measured the temperature change of each. The results were endothermic reactions for the first three reactions, and it was exothermic for Sodium Hydroxide. (sulfuric acid was used as a catalyst for the exothermic reaction).
Information that I have: Mass/volume for each substance, Initial Temperature, and Final Temperature.
Now I want to find the q (energy) for each solution, the enthalpy change for each solution, and the enthalpy change for the reaction.
I'm thinking I can use the heat capacity of water (4.18 J/gK) to calculate, however, I'm not sure.