Create a new table with the following column headings: Reaction, Mass of NaOH, Initial
Temperature, Final Temperature, Heat Energy Released, Moles of NaOH, and Molar
Heat of Reaction. You will have a row for each part of this experiment, representing each
reaction that was performed. This will count as your data summary table.
Fill in the table, showing your calculations neatly for each part separately. For the initial
temperature when two solutions are involved, average the temperature of both solutions
together. Refer back to chapter 5 if you need help with the Heat Energy Released (q) and
the Molar Heat of Reaction (?Hrxn).
Post Lab
1. Write the net ionic equations for each reaction.
2. Arrange the net ionic equations from this experiment to show an example of Hess’s
Law. (Reminder: Hess’s Law is when you add 2 reactions together to match a 3rd
“product reaction”.)
3. Calculate the enthalpy of reaction of the “product reaction” based on the enthalpies of
the two reactions you used to model it.
4. Calculate the percent difference (not percent error) between the measured enthalpy in
the experiment and the calculated enthalpy of the “product reaction”.