[Free Registration/Login Required] Explore endothermic and exothermic processes by making a cold pack or hot pack.

This lesson explains the difference between endothermic and exothermic chemical reactions. It is 3 of 4 in the series titled "Endothermic/Exothermic Reactions."

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

Students will conduct two chemical reactions: endothermic and exothermic. They will see an animation that shows that it takes energy to break bonds and that energy is released when new bonds are formed, and use that animation to explain...

Media-rich lesson in which young scholars 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...

This lesson focuses on heat energy changes in chemical reactions. Exothermic reactions transfer energy to the surroundings. Endothermic reactions take in energy from the surroundings. It also offers links to a video and a test.

In this activity, students examine the size, mass, and growth rates for three species of fish. They interpolate and extrapolate from best-fit models. Students compare the growth rates of endothermic and exothermic animals.

In this chemistry lab, students investigate two types of reactions and answer questions relating to 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.

Young scholars 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...

[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.] In this lesson, students study the difference between reactions that absorb versus release heat as well as how to measure this change in energy.

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, young scholars realize that spontaneous events happen in a certain order. This instructional activity presents an examination of the Second Law of Thermodynamics using a thought story, rubber band inquiry,...

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.] Definition of activation energy and why all chemical reactions require it.