This resource provides a physical reaction. Hydrous and anhydrous calcium chloride react with water to produce physical exothermic and endothermic reactions.

The teacher will conduct the whoosh bottle demonstration to engage students. The class will then begin discussion of endothermic and exothermic physical and chemical changes. The students will then conduct the Science in Motion lab...

[Free Registration/Login may be required to access all resource tools.] Students learn about the role of activation energy in a chemical reaction, and the difference between endothermic and exothermic reactions.

Observe an explosion on a molecular level. Understand how explosions can do work.

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.

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.

Here's a full and understandable discussion of Reaction Rates and Equilibrium.

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

[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.

Understand chemical reactions by learning about enthalpy and entropy.

Explanation of Noble gases and of how atoms attempt to fill their outermost valence shells for stability.

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.

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....

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.

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.

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

[Free Registration/Login may be required to access all resource tools.] Covers the role of energy in chemical reactions.

[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]

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

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

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

Elizabeth Cox illuminates the science behind fire.