Comparing Energy Stored In Nuts

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Comparing energy stored in nuts Siddharth Nair 9C Aim: To compare the energy released by different types of nuts, as well as the energy stored per gram, in different types of nuts. Apparatus: 1. Electric thermometer 2. Copper calorimeter beaker 3. Glass beaker 4. Top pan balance 5. Spirit lamp 6. Measuring cylinder 7. Tongs 8. Needle 9. Watch glass 10. Clamp stand. Variables: 1. Independent - Type of nut 2. Dependent - Change of nut mass, Rise of temperature in water 3. Constant - Vessel (copper), Starting water temperature, Surrounding temperature Fair test:  There should be no errors in the measuring the volume of water  Weigh the nut correctly  Copper heats very quickly and the thermometer should not touch it as there will be a big error  The nut should be held in the same place as far as possible Method: 1. Take a nut, and weight it using the top pan balance. 2. Weigh the needle 3. Put the needle into the nut. 4. Weigh a watch glass. 5. Measure the water, using a measuring cylinder. (50cm3 exactly), and pour the water into the copper calorimeter beaker. 6. Put the thermometer into the water (it should not touch the copper beaker) and record the temperature of the water at the start. 7. Hold the needle (with the nut), with a pair of tongs and set the nut on fire using the spirit lamp. 8. As soon as the nut lights up, move it quickly under the copper beaker. (Do not waste too much time in between) 9. Keep the nut positioned (steady) there till the nut loses all energy and the flame dies. 10. Measure the temperature of the water after the nut goes out, and record, your results. 11. Place a watch glass below the copper calorimeter to collect the ashes of the nut, which fall while burning the nut. 12. Place the burnt nut on

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