thermo websites to visit for additional help
http://www.wwnorton.com/college/chemistry/gilbert/overview/ch13.htm http://www.chm.davidson.edu/java/calorimetry/calorimetry.html, or http://dbhs.wvusd.k12.ca.us/webdocs/Thermochem/Thermochem-WS1.html.
Also http://www.emsb.qc.ca/laurenhill/science/morecalorimetry.html
Nice reading is found at http://www.intute.ac.uk/sciences/reference/plambeck/chem2/p02051.htm