1. Determining the energy in foods
CALORIMETRY
Determining the energy in foods
Haileybury Astana IGCSE Science

2. Calorimetry Energy = change in temperature x 25cm3 x 4.2J
Weigh the food
Measure out 25ml of water
Measure the starting temperature of the water
Ignite the food
Place the burning food beneath the test tube of water
Measure the temperature at the end
Use the formula to determine the energy content of the food
Food
Mass
Start temperature
End temperature
Change in temperature
Energy = change in temperature x 25cm3 x 4.2J
Mass of the food`
Error analysis: Are the values too high or too low? List the sources of error.

3. Bomb Calorimeter