[Free Registration/Login may be required to access all resource tools.] Covers the law of conservation of energy and how energy is conserved in chemical reactions.

Media-rich lesson in which students discover that it takes energy to break bonds, and that energy is released when bonds are formed during the process of dissolving. They also determine whether dissolving is either exothermic or...

Understand chemical reactions by learning about enthalpy and entropy.

This site from Siegen University contains brief information and a step-by-step photo display of burning magnesium. The information is very short but the pictures are definately worth checking out.

In this activity, students understand the relationship between enzyme reaction rates and various environmental factors such as pH and temperature. They recognize the metabolic differences between endotherms and exotherms. They generate...

Through critical thinking, students realize that spontaneous events happen in a certain order. This lesson presents an examination of the Second Law of Thermodynamics using a thought story, rubber band inquiry, discrepant event and lecture.

Simple description and demonstration to illustrate the concept of Heat of solution!

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

Find out what entropy and enthalpy have to do with a spontaneous chemical reaction. [3:44]

Description of the factors influencing gas solubility. This site also provides other chemistry related questions. Topics include dissolving solids into liquids, concentration, and stoichiometry.

This article from the Florida State University provides an excellent explanation of WHY Hess's Law works and examples of how to use the law. Common mistakes are identified and explained.

Through interactive exercises and illustrated example problems, students learn about specific heat capacity and measuring the quantity of heat.

A collection of lessons that have middle schoolers 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,...

Students will create an endothermic chemical reaction by making ice cream. They will observe, describe, and measure the ingredients. After making ice cream, students will measure the temperature of the ice cream and the ice/salt mixture....

[Free Registration/Login may be required to access all resource tools.] Explains chemical property and chemical reaction.

Learn about some uses of calcium chloride as a food additive, as a drying agent, for de-icing, in concrete mixes, and for its exothermic properties.

Learn about the process of germination in this hands-on science experiment. Includes full list of materials, procedures, and scientific explanation of why plants can survive in a variety of environments.

Explains what an endothermic reaction is and gives four everyday examples.

Explore how life invades, colonizes and changes over time. Model a shallow underwater volcano to see what type of island forms, investigate seed dispersal methods and describe how wing size and shape determine which birds fly where.

[Free Registration/Login may be required to access all resource tools.] In this lesson, students study the difference between reactions that absorb versus release heat as well as how to measure this change in energy.

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.