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Reactions And Energy Changes

16 minutes 9 seconds

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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.

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.

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

Person speaking. Caption: So a nanometer would be ten to the minus nine meters.

Person speaking. Caption: Nanoparticles have been used in sunscreens

Person speaking. Caption: and work on it to manage those risks.

Person speaking. Caption: We can apply an electric field or magnetic fields to them.

Person speaking. Caption: about nanobots replicating and taking over the world.

Person speaking. Caption: between one and one hundred nanometers.

Viewer Comments

Michael K. (Reedsville, WI)

February 24th, 2021 at 09:01 AM

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