Solution Calorimetry

Calorimetry Lab...report (Chem 312)

The following report will consist of a collection of graphs and handwritten calculations.

KOH or NaOH (s) --> NaOH (aq) (1)

KOH or NaOH (s) + HCl (aq) --> NaCl (aq) + H2O (l) (2)

KOH or NaOH (aq) + HCl (aq)--> NaCl (aq) + H2O (l) (3)

Experimental data

1) Plot out (with axes labels in Igor) time vs temp data for the three reactions on a single graph.

2) As will be discussed in lab, annotate a single data set (on a different graph using a layout) to show how T_f and T_i were determined, and hence ΔT.

3) Show calculations to (hand written) to determine ΔH₁, ΔH₂, and ΔH₃.

Theoretical (hand written)

1) Use the ∆H_f^oto calculate theoretical values of H1, H2, and H3.

2) Using the concept of Hess’ Law, use the theoretical values to show that H2 = H1 + H3.

Conclusion

1) Comment of the quality of the experimental data.

2) Indicate whether your experimental data “follows” Hess’ Law.

3) Suggest sources of error in the experimental setup.