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Reactions And Energy Changes

16 minutes, 9 seconds

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Videos are generally available for preview to non-members as short clips. Limited full-length titles are also available. Log In to view the full length title.

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Four test tubes. Three are labelled as Fe3O2, PbO2, and MnO2. The fourth is unlabeled and a beaker of colored liquid is being poured into it. Caption: To make the production of oxygen more visible,

Presents three key concepts about chemical reactions and energy changes: exothermic and endothermic reactions, reaction rates involving temperature and concentration, and catalysts. Each concept is illustrated with a variety of experiments and computer animation to illuminate what is happening both visibly and at the molecular level.

Media Details

Runtime: 16 minutes, 9 seconds

Topic: Science
Subtopic: Chemistry
Grade/Interest Level: 9 - 12
Standards:

Release Year: 2001
Producer/Distributor: Benchmark Media
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Lights and gauges with display screens cover the walls. Illustration of energetic reaction drawn on top. Caption: it releases a lot of energy in the form of heat.

Arched pH scale with warm colors on the left and cool colors on the right. Text in the foreground reads, “Acids and Bases for Kids.”

Person in a science lab. One beaker contains an orange liquid, and one beaker contains a green liquid. Caption: It's orange. That means its pH is 5.

Industrial plant from a distance. Caption: That's the world's largest PLA manufacturing plant.

Still image from: All the Answers: Flavor, the Octopus, Tar Pits

Still image from: All the Answers: Solar Eclipses, Microwaves, Death Valley

Still image from: All the Answers: Solar System, Light Bulb, Chemical Reactions!

Still image from: All the Answers: Tornadoes, Wind Energy, Batteries

People feeding dried hay to goats. Caption: How can we figure out how much energy is stored in this hay?

Three isotopes next to each other that are labeled, “Carbon-12, Carbon-13, Carbon-14.”

Viewer Comments

Michael K. (Reedsville, WI)

February 24th, 2021 at 09:01 AM

Excellent video that is direct and linked to several NGSS standards.