Hi everyone! Today, put your glasses, things are getting hot. Allons-y! What is called “Thermite” is a dark red-coloured powder, which has a melting temperature of 2200°C (4000°F). Hence its name, “Therm”-ite. You could almost roast anything you want. That’s right Jamy!
– Oh, you… But Thermite also has more common uses, in the civilian they use it weld train rails, they simply make it burn above two joining rails, and melt them together. In the military, they used it during war to destroy documents or weapons they couldn’t carry, Thermite would simply melt everything and make it unusable for the enemy. Thermite is made out of two powders, very thin aluminum powder and iron oxide III, which is pure rust. Still, it’s really hard to find and anyway too dangerous to handle, don’t try this at home. In order to obtain Thermite, you don’t just mix the powders like that, they need to be in proportions called “stoichiometric”. QUOI ?! Ok, to understand this barbarian word, let’s look at the reaction equation. Here is the equation, and what it says is that you have 1 molecule of iron oxide, reacting with 2 aluminum atoms, to create iron and aluminum oxide. So this is what we call stoichiometric proportions: twice as much aluminum as iron in terms of number of molecules, especially NOT in terms of mass, because iron oxide is much heavier than aluminum. Example: Say you have recipe with apples and strawberries. Now imagine you need twice as much strawberries as apples. Then, the recipe says you need to use 1 apple with 2 strawberries, 1 apple with 2 strawberries again and… You don’t have any apples left to react with strawberries! Though you weighed twice as much, you’re gonna have wasted strawberries. Hence the importance of stoichiometric proportions. Of course, there’s no way to count how many molecules you have in the powder. For this, you’re gonna need to know what’s called their molar mass. The molar mass is what the powder (or anything else) weighs for a precise and known amount of elements: 1 mole. In a nutshell, imagine you have 2 bags containing precisely 1 mole of molecules/atoms of iron oxide/aluminum, these bags will respectively weigh 160g for the iron, and 27g for the aluminum. Still, you have exactely the same amount of elements on each side. So we’re gonna use this to know how much powder
to weigh in order to have perfect proportions. Alright here we go, now we’re gonna make Thermite. We will mix 1 mole of iron oxide powder, with 2 moles of aluminum, so we will have the best proportions. Now that we have Thermite, I will place it in a small terracotta pot, which can resist the high melting temperature. So Vincent, tell me what kind of set-up we have here. Here we set our pot filled with Thermite, under which we made a little hole so when the powder melts, it will pour down on our target. Oh, I see we have a nice looking LCD screen, ready to serve Science, so now we’ll see if Thermite can actually burn through anything. Ok here we go! He thought so… To ignite Thermite, we’re gonna need something hotter, that’s why we’re using magnesium strap, it burns at a really high temperature and it’s what we need to start the reaction. Here we go, I’m lighting up. Oooh, I think the monitor didn’t like it! Yeah, that was hot, but still didn’t go through! Myth busted, but it was a bit thick… And look at what we have here, tiny balls… of what? Iron! Remember the equation reaction, it produces iron. If you bring a magnet, it will stick. An idea just crossed my mind… What if very hot… meets very cold? Cold like..? Like a big chunk of ice! Well, let’s test it… We have the blasting shields for this one, just in case something “unexpected” happens. Oh yeah… That’s what I call an ice cube! And I’ve got my little bowl of Thermite! We’re gonna do this quickly, the night starts falling. Let’s pour it in! How much do we have? I don’t know, I’d say… … a lot? Yeah, “a lot” seems accurate enough. I’m drilling a hole in the ice so that when the melting Thermite drops, it remains in the heart of the ice. Ok, here we go, the Thermite is ready! Allons-y! Lighting up! Wow! The ice block is still intact, but what a huge explosion! A theory says that we’re getting an explosion supposedly because the hot temperature of Thermite would decompose water in dioxygen and dihydrogen, which would explode, but I don’t really believe it for it would need to be very spontaneous. We have another theory however, which is that when the molten Thermite touches the ice, a crust will form on the drops when they cool down and leave a hot molten core of Thermite inside, and a simple air bubble trapped inside would grow until it cracks and explodes. But no one really knows, nobody has found the explanation of this incredible reaction. Still fun, though! Don’t ever try this at home.
– Yeah seriously, don’t, look at the table… Just on time, almost too dark. If you liked this video, don’t forget to give it a “thumbs up”! Also subscribe to the channel, check our other videos and follow us on social networks, Twitter/Facebook! And see you next time, for more adventures! For Science! So what do I say..? … to “procrurate” ? (You won’t have it, a**hole!) You won’t get some Jean-Kevin, go back playing with cornstarch and water! So, we were 4 in a shack this weekend… What were we doing? Oh definitely just a Science video! Here we go! (You missed it!) I love like you go “Oh what a
nice- no ok shut up, start over”. We got snow! Look at that! Heat for the whole family!