Did you know that evaporation of dry ice can be caught in a soap bubble? If you drop a pellet of dry ice into the water, there will be white smoke and a large number of gas bubbles. When you add into the water several drops of liquid soap forms a thick foam of soap bubbles filled with white smoke. This is because dry ice is actually a gas that does not melt and from the solid state instantly turns to gas. This is a very simple substance, CO2 in the solid phase, which can be purchased without any problems in briquettes or pellets. But how safe is the dry ice and its application at home?
How and why use dry ice?
Basically, dry ice is used for cleaning the surfaces of technical devices such as machine parts and equipment when repairing or maintenance. Dry ice is used to transport food, especially for storing and transporting ice cream. The fact that dry ice is very easy to carry from place to place, which greatly facilitates the implementation of the sales of ice cream and soft drinks. However, many people purchase dry ice to hold houses a number of fascinating experiments. Agree, an instant transformation of dry ice into the gas state without the intermediate liquid phase, will surprise the guests. You can even arrange the whole idea.
Variability of state of matter is called sublimation, and its temperature is -78,5°C. due to the risk of cold burn, dry ice should not be kept in hand. As a precaution you can use an ordinary cloth gloves.
Principles for the handling of dry ice at home
Because of the ease of application, pellets of dry ice are often used in home experiments. As a rule, they are small and easier to dose. By the way, for the day in a plastic container evaporates up to 15% of the mass of dry ice. Most experiences with this simplest substance is based on the same principle: when the dry ice is in contact with water, the transition from solid phase to gas looks like a boil. However unlike the latter it is the amount of energy bright enough and hard to confuse with anything else. The trick is that since evaporating CO2 is heavier than air, it surrounds a container of water as it lay on the surface unlike normal smoke which rises.
So the experiment was a success, you need to throw in a container of water, the pellets or briquettes of dry ice. From the temperature of the water depends on the rate of evaporation — the water is warmer, the shorter and brighter the effect. It is at this point possible to conduct experiments to let the steam go out or to limit evaporation in a confined space. It is important in these experiments not to use plastic bottles – they can break, at best ice pairs knock out the plug. This reaction is due to the density of matter in the gaseous state which it occupies more space. The safest use of dry ice is “manufacture” of soap bubbles.
Let’s see what will happen if you drop dry ice in the pool:
How to safely use dry ice?
As in the case of other substances, when used correctly, dry ice is completely safe. However, if you neglect the safety rules, you can get serious injuries and endanger the lives of all those present. So if you or your friends are planning to use dry ice at home, take the necessary precautions:
- Spend absolutely all of the experiments with gloves. Don’t forget about the temperature of a substance! In the solid phase, the temperature of dry ice is -78,5°C.
- Do not breathe in the fumes of dry ice , the excess CO2 can cause poor health and headaches.
- Do not place dry ice in a sealed container under any circumstances. Keep the stuff you need in the tank with a couple small holes – this protects the tank from rupture.
Is it possible to suffocate from dry ice?
Yes. In any case, do not use a large amount of briquettes or pellets of dry ice in enclosed spaces (e.g. in a sauna). A large amount of carbon dioxide may displace the air to the ceiling and the room will be nothing to breathe.