There are two reasons. First, liquid nitrogen is colder than liquid oxygen and thus more effective at flash freezing. Second, liquid oxygen is a fire hazard; it creates an atmosphere of pure oxygen that allows substances to burn more easily. Nitrogen does not support combustion.
No. The wind is composed of a small amount of water vapor and about 20% oxygen and about 80% nitrogen. The water vapor may freeze but the oxygen and the nitrogen cannot freeze at the temperature of liquid nitrogen. Oxygen has a much lower freezing point than liquid nitrogen and if the nitrogen were to be frozen, liquid nitrogen is not cold enough to freeze it...sort of like trying to make ice using cold water.
Yes, freeze air until it becomes a liquid and perform fractional distillation. Oxygen, nitrogen and other gases will be produced.
according to research it can freeze anything with oxygen or tissue i am not certain if it can freeze objects such as computers, toys, cars, or anything metal but it can most definitely freeze you
The freeze.
Liquid nitrogen is simply nitrogen gas in its liquid state. The stuff is so cold you can consider it like an acid if you are ever stupid enough to stick your finger in there without cryogenic protection. By immersing them in liquid nitrogen you can turn marshmallows hard as bullets, shatter flowers like glass, turn a soft peach into something that can hammer nails into wood, and a whole lot of other things.
dry ice −56.4 °C and liquid nitrogen is −196 °C
Liquid nitrogen is colder than liquid oxygen. You use the liquid nitrogen to chill the oxygen in the air and liquid oxygen will form. Liquid water and dry Ice (CO2) should also form due to their presence as well, but not in large quantity. WARNING!! High concentrations of oxygen should be considered dangerous. When exposed to a small ignition source, it can cause flammable materials to combust much like an explosion, and will cause normally non flammable materials to burn readily. Human flesh burns better than wood after being exposed to 100% oxygen for a period of time. Please be careful.
Liquid nitrogen is commonly used to freeze things due to its extremely low temperature of -196 degrees Celsius. It is often used in laboratories and industrial settings to quickly freeze biological samples or materials.
By fractional distillation. Allow liquid air to get less cold. At around 77.4K, nitrogen will boil off while oxygen will remain liquid. The temperature will begin to rise again when all the nitrogen has boiled off.
Yes, oxygen will freeze faster than nitrogen under the same conditions due to its higher freezing point (-218.8°C for oxygen compared to -210°C for nitrogen). Since oxygen freezes at a higher temperature, it will solidify more quickly as the temperature drops.
If the temperature were lowered gradually enough for the substances to be in (approximate) thermal equilibrium, then nitrogen would freeze first. Nitrogen has an observed normal freezing point of 63.05 K, and oxygen has a freezing point of 54.85 K. As the temperature is lowered, nitrogen's higher freezing temperature occurs first.
Liquid nitrogen is made by taking in air from the atmosphere and compressing and cooling it. Once it is cool enough, it forms a liquid. This liquid contains argon, oxygen and nitrogen. These elements are then separated and sold as a commodity. The temperature is the only difference.