To investigate how much energy each type of food produces

... GCSE biology assessment by Brian Hon 10H Aim: To investigate how much energy each type of food produces Method: I gathered some food; a kit Kat, crackers, bread, chewies and some crisps; here are the weights of the foods before lighting: Bread - 1.5 1.67 1.59 Rice Cake - 2.86 0.93 1.9 Cracker - 1.22 1.88 1.55 Crisps - 1.41 0.67 1.04 Kit Kat - 2.63 2.73 2.68 I set up a boiling tube clamped to a stand and then used a Bunsen burner to light the food. The food caught fire and heated the water (at 24.5 degrees) inside the boiling tube. I then measure the temperature of the water after the food had burnt down and here are my results Bread - 44.5 38 41.25 Rice cake - 33 39 36 Cracker - 48 68 58 Crisps - 46 38 42 Kit Kat - 40 48 44 I have also measured the mass before and after the energy transfer: Bread: - 0.3 0.32 w 0.31 Rice cake: - 0.23 0.15 0.19 Cracker: - 0.11 0.2 0.16 Crisps: - 0.14 0.01 0.08 Kit Kat: - 0.2 0.4 0.3 To work out the mass change we can

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