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Purpose:
To determine the amount of heat (calories) in pecans or other food substances.
Summary:
Students burn a pecan using the energy released to heat a sample of water. Difference in temperature is measured and used (in addition to specific heat) to determine the amount of heat transferred.
Objectives Links:
6: E. Thermal Energy
Process Skills Checklist
Materials:
- aluminum foil
- modeling clay
- 100 mL H2O
- ring stand
- matches
- 1/4 of a pecan
- utility clamp
- Erlenmeyer flask
- paper clips
- thermometer
Safety Concerns:
Wear goggles & apron; use flame precautions. Beware of soot on flask! Use a paper towel to wipe as much soot off as possible before washing.
Revision Date:
August 2006
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