1. Calculate heat of combustion for butane. Given: mass water- 129.91g mass butane 0.15g old temp- 16.4 degrees C new temp.- 26.7 degrees C 2. Relevant equations 2C4H10 + 3O2 yields 8CO2 + 10H2O 3. The attempt at a solution I've tried, but I really have no idea. I only know how to calculate q and apparently that's not the same.