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AP Chemistry – Bomb Calorimetry On-Line Lab Name______________________________ Use the following web site: http://www.chm.davidson.edu/ronutt/che115/bomb/bomb.htm Burn 2 g of each of the following compounds in a bomb calorimeter. When you get to the web site, look for the Java applet – a place where you can insert the grams and then press start. It will show you how the sample is placed in the bomb calorimeter and you must the press ignite. You are going to record the final temperature so you can make some calculations. Compound Formula Molar Mass Initial Temp. Final Temp Change in Temp Q cal Heat produced ∆H Calculated Benzoic acid Glycine Sucrose PLEASE SHOW your work at the bottom of this page and then record your answers in the above data table. Sample calculations and formulas: 1) To find q calorimeter: q cal = heat capacity of calorimeter x temperature change (remember q stands for heat) q rxn = - q cal (if temp change is positive – heat is given off) 2) Find ∆H using the molar mass of the substance you are testing (remember ∆H = kJ/mol) ** Note: Assume the heat capacity of the calorimeter = 5.15 kJ/deg C