Search for Science Fair Projects

1000 Science Fair Projects with Complete Instructions

Heat (Thermodynamics) Science Fair Project

Chemical Energy in a Peanut

Medium
Chemical Energy in a Peanut | Science Fair Projects | STEM Projects
How much energy is hiding inside a single peanut? Everything you eat contains stored chemical energy. A peanut holds enough to measurably heat water. You stick a peanut on a needle pushed into a cork. A large metal can with air holes acts as a chimney around the burning peanut. A smaller can of water sits on top. You record the water temperature before lighting the peanut. After the peanut burns out, you stir the water and record the new temperature. The temperature rise tells you roughly how much energy the peanut released. You can calculate the result in British thermal units. Try different nuts to see which one heats the water the most.

Hypothesis

The hypothesis is that peanuts contain enough energy to heat water.

Method & Materials

You will use a needle and cork to attach a peanut to a skewer, place it in a large can, and then measure the temperature of the water in a small can.
You will need a small bag/can of unsalted, shelled peanuts, a cork, a needle, a large metal juice or coffee can, a small metal can (like a soup can) with paper label removed, a can opener, a hammer, a large nail, a metal BBQ skewer (like the kind for kebobs), about a cup of water, a thermometer, some matches or a lighter, a piece of paper and pencil to record your observations, and a scale.

MEL Physicshands-on physics experiment kits delivered monthly — real experiments, not just reading. (Affiliate link)

See whats included

Results

The experiment showed that the chemical energy stored in the peanut was released and converted into heat energy, which raised the temperature of the water in the small can.

Why do this project?

This science project is interesting and unique because it shows how a tiny peanut can be used to heat a container of water.

Also Consider

Experiment variations to consider include using different kinds of peanuts or other kinds of nuts, and using more than one peanut.

Full project details

Additional information and source material for this project are available below.

Related video

These videos explain the science behind this project and demonstrate key concepts used in the experiment.
Share this Science Project:

Related Science Fair Project Ideas

Water Temperature and Convection
Drop food coloring into three jars of different temperature water and watch the color spread at wildly different speeds.
Medium
Wood Type and Burning Temperature
Burn equal pieces of oak, maple, cedar, and pine under water to discover which wood type produces the most heat.
Medium
Surface Area, Heat, and Wind in Evaporation
Compare water in a wide plate versus a narrow glass, sun versus shade, and fan versus still air to see what speeds up evaporation.
Medium
Share this Science Project: