Chemistry often works wonders. This time we present to your attention another homemadebased on chemistry and properties of certain substances. We are talking about the manufacture of a chemical heating pad, which in its properties is in no way inferior to the classic.
The process of manufacturing a chemical heating pad can be observed by watching the author’s video
What do we need:
- copper sulfate;
- a spoon;
- food foil;
- kitchen salt;
- plastic bottle;
- wooden skewer for barbecue;
- glue gun.
At the beginning of the video, the author uses vitriol ground in a coffee grinder. According to him, he does this solely for demonstration, since vitriol crystals crack when heated. As for the properties of this substance, one important property is the conversion of vitriol into a gray powder upon heating. Also, when heated, vitriol completely loses water.
Water should be added to the resulting powder as it begins to heat up. In this case, heating accelerates the onset of the reaction. The author uses this property of vitriol to obtain a chemical heating pad. Let's get started.
Take a piece of food foil. The author uses a piece of 28 cm wide and 20 cm long.
Fold the foil in half.
After that, we wrap in foil in a tube.
We take a wooden skewer and glue it into the bottle cap with a glue gun.
Now mix the main components of the burner, i.e. salt and gray sulfate powder. The ratio of salt and vitriol is 1: 2.
Pour salt and vitriol into a bottle.
Add water.
We close the bottle cap, after which we observe that the mixture quickly warms up to room temperature due to the dissolution of anhydrous copper sulfate.
We put the foil tube on the skewer to evenly heat the liquid in the plastic bottle.
During the chemical reaction, hydrogen and heat will be released, which will accelerate it. In this case, it is necessary to constantly bleed off hydrogen and control the pressure in the bottle by opening and closing the lid, as well as periodically shaking it.
After some time, the aluminum foil will begin to dissolve, and copper will be released from the solution.
The end of the reaction can be found by the end of gas evolution for a minute.
The author’s test showed that in this way the water is heated to 50 degrees Celsius. Again, according to the author, you can boil water, but a plastic bottle will not stand this. This can be done in a glass cup. This heating pad can be used to warm your numb fingers in fishing or at home. By this principle, army flameless food heaters work.