... one at a time. To calculate the amount of energy that each alcohol gives out I have to multiply the amount of water heated (60) by 4.2 and then multiply that answer by the rise in the temperature. Therefore; ENERGY (Joules) = Amount of water heated (ml) x 4.2(ml) x temperature rise (°C) Preliminary experiments To help design my experiment I shall need to do a preliminary experiment. This experiment shall determine how long I burn the alcohols for. Here is a diagram showing how the preliminary experiment will be set up: Equipment needed: * Crucible * Mineral wool * Heat proof mat * Timer Method for Preliminary experiment * Put 3ml of alcohol and a small amount of wool into a crucible. * Light it * As soon as the alcohol has lit start timer. * Leave alcohol burning * As soon as alcohols finishes burning, stop timer. I will repeat this experiment four times; each time I do it I shall burn ...

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