Boom! The Thermite Reaction / Mr. Denjiro's Happy Energy! скачать в хорошем качестве

Boom! The Thermite Reaction / Mr. Denjiro's Happy Energy!

DENJIRO: I have two rusty iron balls. I'm going to cover one with aluminum foil and strike them against one another. You can see that there were sparks flying. The key here is that the rusty surface has iron oxide, which is iron combined with oxygen. Striking the balls against one another caused heat, and the aluminum and iron oxide reacted with each other to give off sparks. Now, let's experiment using finely powdered iron sand and aluminum. The iron sand is iron oxide, a combination of iron and oxygen. Let's mix it with powdered aluminum and run electricity through it to start a fire. It's burning! When the temperature becomes very high, a vigorous reaction occurs where aluminum bonds with the oxygen it extracts from iron oxide. This process wherein aluminum extracts oxygen from oxidized metal is called the thermite reaction. Because the iron sand had its oxygen taken away, a block of iron remains. Now, let's replace the iron oxide with copper oxide. We're using less materials now. As you can see, even though we used a smaller amount, it blew up. When aluminum extracts oxygen from an oxidized material, it uses energy to do so. Then, when that oxygen combines with the aluminum, energy is created. This difference in energy appears as the heat of reaction. When aluminum extracts oxygen from copper oxide, it uses less energy than when it extracts oxygen from iron oxide, and that's why there was an explosive reaction. What happens when we test out the thermite reaction of copper oxide underwater? Attached to this wire is a bag filled with aluminum and copper oxide. Let's see what happens. The thermite reaction can occur underwater, where there is no oxygen, because the aluminum extracts oxygen from the copper oxide. I hope energy will bring you all happiness. Our magic word is "Happy Energy!"