Introduction: We have all seen a burning candle or burning wood. Burning is a chemical reaction between the burning object and the oxygen gas. Burning is the most well known chemical reaction that creates heat energy. Of course not all chemical reactions create energy as much as burning. Most heat producing chemical reactions may have no flame at all.

In this project we will research the chemical reactions that produce or require energy. We will also attempt to find a general rule that helps us determine if a chemical reaction will produce or absorb energy.