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This experiment will demonstrate the heat that is released when iron is oxidized. Students will learn to prepare chemical mixtures safely, identify when a chemical reaction is taking place, observe the results of an exothermic chemical reaction and the effects of differing constituents on the rate of the reaction, and apply their observations to the refining and corrosion of iron. This activity would be appropriate for high school and college level students. The lesson should take about 20-30 minutes of class time. This document will serve as a framework for instructors and may be downloaded in PDF format.

In this laboratory exercise, students will be introduced to the oxidation / corrosion of iron from two different sources (flame and water). From the examination of corrosion from multiple sources, students will be able to compare and contrast the effects each has on the iron samples. Students will also be able to observe the effect of various material processing techniques has on the corrosive properties of iron.

The Materials Science and Technology Teacher's Workshop (MAST) provides this activity to illustrate the heat energy that is given off during the oxidation of iron. The class will analyze commercial hand warmers and the chemical reaction that allows them to heat up inside their plastic bags. The lesson includes information on the laboratory procedure. Discussion questions are also included.