Humans obtain all of their energy requirements from the food they eat - VCE - SSCE Chemistry - Question 12 - 2006 - Paper 1
Question 12
Humans obtain all of their energy requirements from the food they eat. The amount of energy in food can be measured using a bomb calorimeter.
The following are step... show full transcript
Worked Solution & Example Answer:Humans obtain all of their energy requirements from the food they eat - VCE - SSCE Chemistry - Question 12 - 2006 - Paper 1
Step 1
Fill the calorimeter with water and wait until the temperature has reached a steady value
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This step ensures that the calorimeter is properly set up before any measurements are taken.
Step 2
Accurately weigh the sample of the food and place it inside the sealed compartment or 'bomb' in the presence of excess oxygen
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Weighing the sample is crucial for calculating the energy content based on the amount of food used.
Step 3
Measure the rise in temperature
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This initial temperature measurement establishes a baseline for the experiment.
Step 4
Pass a measured amount of electrical energy into the system
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This step introduces energy into the system, igniting the food sample for combustion.
Step 5
Ignite the sample with electrical ignition wires
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Ignition of the sample starts the combustion process, essential for measuring energy released.
Step 6
Measure the rise in temperature again
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This final measurement helps determine the energy released based on changes in temperature.
