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5:26
Exothermic welding also known as exothermic bonding, thermite welding and thermit welding, is a welding process for joining materials that employs molten metal to permanently join the conductors.
22 Jun 2017
194
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0:55
Glycerine reacting with KMno4
21 Mar 2008
1753
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0:42
A difficult concept for many students to understand is the energy involved in breaking and forming bonds. A hydrate is a substance that has water bonded to it. In order to dehydrate you must add energy (endothermic) to break the bond to water. When hydrating you are forming a bond to water and will release energy (exothermic). This visual demonstration reinforces the concept.
4 Jan 2008
24329
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0:04
exothermic reaction of natrium in water
5 Feb 2008
3437
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1:49
The UltraShot exothermic remote welding system includes a 12V rechargable battery - product demonstration.
29 Jul 2009
731
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0:40
In this experiment we will make a oozing foamy batch of elephants toothpaste. We will use 30% Hydrogen Peroxide and catalyst of Sodium Iodide to create the eruption for the Elephants toothpaste. In the process we will instantly release oxygen, water, and heat in an exothermic reaction that decomposes the hydrogen peroxide. Dont try this at home without proper safety precautions and adult supervision. 30% Hydrogen peroxide is nasty stuff and can burn the skin on contact badly.
22 Jul 2010
675
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2:58
Incredible! See how much energy is in a pound of sugar. No wonder too much sugar can make you fat.
14 Jan 2007
2277
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2:02
Best Chemical Reaction simulation of a Stromboli-like volcano. Blows doors on the baking soda vinegar reaction.
15 Jan 2007
4951
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1:07
Music: Kevin MacLeod The term "Thermite" refers to the mixture of aluminum and ferric oxide used in this experiment. It is sold commercially and is used for such applications as railroad welding and incendiary bombs. Rust and aluminum are combined and ignited with a magnesium ribbon. Molten iron is produced and lots of energy is released. This demonstration produces heat at above 2800F or 1500C. Fe2O3 + 2 Al --> Al2O3 + 2 Fe Safety-This is an extremely DANGEROUS reaction and should only be done by trained professionals. Since YOU are not a trained professional DON"T try it.
12 Oct 2007
21506
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1:35
Music: Kevin MacLeod Once used as solid rocket fuel, because the reaction requires no oxygen. Sulfur and zinc react vigorously. The reaction with zinc produces flame and a near explosion. Sparks fly and smoke billows in this dramatic chemical demonstration. Please do not try this one at home.
7 Nov 2007
51001
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2:03
The term "Thermite" refers to the mixture of aluminum and ferric oxide used in this experiment. It is sold commercially and is used for such applications as railroad welding and incendiary bombs. Rust and aluminum are combined and ignited with a magnesium ribbon. Molten iron is produced and lots of energy is released. This demonstration produces heat at above 2800F or 1500C. Fe2O3 + 2 Al --> Al2O3 + 2 Fe Safety-This is an extremely DANGEROUS reaction and should only be done by trained professionals. Since YOU are not a trained professional DON"T try it.
9 Nov 2007
15776
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1:01
The "Hot Ice" reaction is amazing, but messy and can only be used once. A great reusable alternative of a supersaturated solution are chemical hot packs that you can buy from a camping store. They contain a solution of sodium acetate that can be reset in less than an hour. They are also good as hand warmers, but why would you buy those?
23 Jan 2008
24179
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0:30
gummi bear heavy chemical reaktion
4 Jun 2008
2050
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2:46
Harness the power of the classic potassium permanganate and glycerin reaction to make very effective miniature chemical fire starters. Easy to make, and great for camping trips. Just be very careful!
4 Jun 2008
24283
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2:04
Making huge amount of hydrogen isn’t that difficult you may think. Let's see how! What you need: 1. hydrochloric acid (commonly known as Muriatic acid) 2. aluminum
17 Jul 2008
4747
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1:20
A classic chemistry demonstration, also known as elephant's toothpaste. Hydrogen peroxide is decomposed to form oxygen gas and water. When potassium iodide is added as a catalyst, the oxygen forms bubbles and creates a large volume of foam. 2H2O2 --> O2 + 2H2O *******www.thirstforscience**** Music: Kevin MacLeod
21 Feb 2009
25241
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