Cornell University
Energy Changes in Chemical Reactions
The heat of solution measures how much thermal energy a dissolving substance consumes or gives off. The experiment demonstrates both endothermic and exothermic reactions. Scholars dissolve several substances, measure the temperature...
American Chemical Society
Temperature Changes in Dissolving
Alia-Seltzer tablets cause a very obvious chemical change, but do they also cause a temperature change? Each class member explores hot/cold packs, discussing how these temperature changes occur. Groups then design and carry out their own...
American Chemical Society
Energy Foundations
Only 10 percent of an incandescent bulb's energy is used to create light; the remaining 90 percent is heat. In the unit of activities, young chemists examine energy through hands-on activities, videos, discussions, and readings. Scholars...
Virginia Department of Education
The Rate of a Chemical Reaction
If your pupils think a catalyst is a list of their cats, then this might be the lesson plan for you! Young chemists study the effect of temperature, catalysts, concentration, and particle size on reaction rates during four different...
University of Georgia
Endothermic and Exothermic Reactions
Equip your chemistry class with the tools to properly understand endothermic and exothermic reactions. Young chemists collect, analyze, and graph data to determine how the Law of Conservation of Matter is applied to chemical composition...
American Chemical Society
Change in Temperature - Endothermic Reaction
Now that learners have been exposed to chemical changes, they learn that some take in heat and therefore, decrease in temperature. The same reaction that they have been investigating between baking soda and vinegar is revisited,...
Beyond Benign
Exothermic and Endothermic Reactions
How can you tell the difference between endothermic and exothermic reactions? Chemistry scholars perform and observe two chemical reactions, measure the temperature throughout, then draw conclusions about changes in energy from their...
Purdue University
Can You Design a Hot or Cold Pack?
You're getting warmer. Groups conduct an experiment to determine which of four chemicals are in hot/cold packs. They learn about exothermic and endothermic reactions and use this knowledge to design a hot/cold pack that is small enough...
Kenan Fellows
How Much Heat Can a Phase Change Produce?
Scholars learn about heat release in phase changes. They perform calculations as they compare and contrast a science fiction passage and a home heating application.
Kenan Fellows
How Much Energy Is That Anyway?
The fifth instructional activity in the six part series introduces units of energy including calories, Calories, and joules. Scholars determine the energy released when eating a snack and during activity.
Chemistry Collective
Virtual Lab: Temperature and the Solubility of Salts
Can your scholars solve the mystery of why salts dissolve? A virtual workbench allows them to experiment with temperature and solubility with no solution prep and no post-lab clean up! Users determine the solubility of a variety of...
Chemistry Collective
Virtual Lab: Cobalt Chloride and Le Chatelier’s Principle
Colorful cobalt complexes make a great way to learn about Le Chatelier! Eager chemists explore equilibrium through a virtual lab. Individuals use solutions with two different concentrations and observe the color changes that indicate...
Next Generation Science Storylines
Why Do Some Things Get Colder (or Hotter) When They React?
Some reactions absorb heat while others release it. Young scholars investigate both types of reactions in a 12-lesson unit. Each lesson presents a lab investigation that monitors temperature and considers the types of reactions taking...
Royal Society of Chemistry
Energy—Gifted and Talented Chemistry
What has more energy than a room full of pupils after a fire drill? This lesson plan! Explore the changes in energy during different chemical reactions, discover why some reactions feel cold and others feel hot, and tackle the concept of...
Rensselaer Polytechnic Institute
Molecules to the Max!—Educators Resource Guide
From molecules to nanotubes, an engaging unit explores the world of tiny science. Fifteen hands-on experiments and lessons engage young scientists as they learn chemistry. Discussions, worksheets, and data analysis reinforce the concepts...
American Chemical Society
Exothermic, Endothermic, and Chemical Change
Scientists can't observe bonds breaking or forming, so how do they distinguish between exothermic and endothermic reactions? Young scholars complete two experiments to do just that. They monitor temperature change and calculate the...
CK-12 Foundation
Hotpack - Coldpack
Chemistry can help athletes and others protect and treat injuries. Use the interactive activity to explore the chemical reactions in instant hot and coldpacks. Learners manipulate the type of salt in the pack and watch the reaction take...
National Institute of Open Schooling
Chemical Thermodynamics
All chemical reactions require energy. To explore thermodynamics, classes read and discuss its laws, exothermic and endothermic reactions, enthalpy in many forms, calculate enthalpy problems, and use Hess' Law to calculate enthalpy of a...
American Chemical Society
Energy Changes in Chemical Reactions
Some chemical reactions produce heat, but what is really going on? Lesson focuses on the concept of energy changes, both exothermic and endothermic. Scholars perform multiple experiments, hands-on activities, and view videos of the...
Science Geek
Reaction Kinetics
Show your classes the science behind rates of reactions with a presentation that explains factors that affect the rate, activation energies, exothermic and endothermic processes, and the proportionality of the product and reactant rates.
Science Geek
Basic Thermochemistry
Heat is more than just temperature, as viewers discover throughout a presentation about thermochemistry that emphasizes vocabulary. Definitions include joule, calorie, energy, enthalpy, calorimetry, exothermic and endothermic process,...
Mr. E. Science
Chemical Reactions
Once I told a chemistry joke, but there was no reaction. Get young chemists involved in changes and reactions with a presentation that begins with physical and chemical changes and chemical reactions. It moves on to chemical equations...
Curated OER
Caterpillars and Climate: How Temperature Affects Feeding Rate In Insects
Do you eat more when you are hot or when you are cold? Young scientists observe the eating pace of two caterpillars at different temperatures. The differences in endotherm and ecotherm animals' ability to adjust to temperature change...
Virginia Department of Education
States of Matter
Scientists have been studying exothermic reactions before they were cool. The lesson begins with a discussion and a demonstration of heat curves. Scholars then determine the heat of fusion of ice and the heat needed to boil water through...