If a reaction equation is difficult to measure the enthalpy change for, and there are no other equations that will add to make the target equation, we can still use Hess's Law.  The text reference is p.332-334. 
Homework:  p.335 #2,3; p.339 #9, 10a; lab report is due tomorrow

The experiment is found on p.351-352 in the text.  For the Discussion, answer p.352 b-f as well as the following:
r)  What are the significant sources of error?
s)  The accepted value of molar enthalpy of combustion for magnesium is -601.6 kJ/mol.  Suggest specific reasons that your value is higher or lower and explain why.

The text reference for today's lesson is p.322-326.
Homework:  p.326 #1-3; p.329 #5; prepare for the experiment on p.351-352 by writing a hypothesis (see the "Prediction" p. 351) and setting up the observation table.

We had a formative quiz on calculating enthalpy from experimental data.  A copy is found on the unit 3 page of this site.  The text reference for the lesson is p.331.
Homework:  p.332 #1; p.339 #1; p.312 # 1, 2, 5

We completed an experiment today, comparing enthalpies of combustion of alcohols, from p. 349-350 in the text.  The discussion questions are:  p.350 b, d, f, and the following.
k)  Look at the accepted values of enthalpy of combustion of each alcohol shown in (g) on p.350.  Suggest specific reasons that your value differs from the accepted one, stating why it is higher or lower than the accepted value.
If you need practice at the basic mole calculations, there are some questions on p.810, with answers on p.819.

Class was short today due to OSSLT scheduling.  We discussed problems from the past two days.  Complete any work that hasn't been finished.  Prepare for the experiment Combustion of Alcohols, p.349, by stating your hypothesis (see Prediction in text) and prepare an observation table.

Read p.306-309 and make note of the different types of molar enthalpy, and of the assumptions made when using a calorimeter in an experiment.  Answer p.308 #2; p.311 #6-9.  Read p.313-319 and make note of the four methods of representing enthalpy change.  Answer p.319-320 Practice #1, 2, 3acd, 4, 5; Section #1.

Calorimeters are used to measure the heat energy, Q, absorbed or released in a physical or chemical change.  See p.308-311 in your text.
Homework:  Complete the "Are You Ready" handout and hand it in tomorrow.  Answer p.310 #4, 5, 10.