Thermochemistry
Be sure that you are working problems on thermochemistry. For additional problems, please consult http://www.emsb.qc.ca/laurenhill/science/morecalorimetry.html, http://www.chm.davidson.edu/java/calorimetry/calorimetry.html, or http://dbhs.wvusd.k12.ca.us/webdocs/Thermochem/Thermochem-WS1.html. and click on "heating curve tutorial" for some good information.