A step-by-step example of how to complete Hess's Law problems. This example includes all the manipulations that may be required for Hess's Law.

[Free Registration/Login may be required to access all resource tools.] Definition of activation energy and why all chemical reactions require it.

A quick, five question review over various concepts of chemical reactions.

A collection of lessons that have students completing a design project where they construct, test, and modify a device that uses chemical processes to either release or absorb thermal energy. Site includes work samples, phenomena,...

[Free Registration/Login may be required to access all resource tools.] Provides an introduction to chemical reactions.

In this experiment, three reactions are performed in a sealed Ziploc bag so that they can be observed. Students identify whether physical or chemical change has taken place.