Boyle's law, the principle that the pressure on a gas is inversely proportional to its volume at constant temperatures, is demonstrable with everything from balloons to soda cans to SCUBA gear. Aerosol cans and syringes both rely on Boyle's law in order to perform their functions as well.
In an aerosol can, the contents are mixed with a gas under pressure high enough to render the gas into a liquid. When the nozzle is opened, however, this reduces the pressure suddenly, allowing the gas to expand. As it does so, it forces its way out of the nozzle, carrying the contents with it. The same effect occurs when a pressurized soda can is opened, allowing pressurized carbon dioxide to form bubbles in the beverage.
Drawing blood with a syringe uses Boyle's law in a different way. When the plunger of the syringe is pulled back, it increases the volume of the chamber inside the syringe. This reduces the pressure, creating a vacuum effect. This draws blood into the chamber through the needle.
Divers must keep Boyle's law in mind at all times. When a diver descends, the pressure around him increases. This forces nitrogen into solution inside his bloodstream. If he ascends too rapidly, the dissolved nitrogen expands suddenly, forming bubbles. This causes the painful and potentially life-threatening condition known as the bends, and only returning to a pressurized environment can reverse it.Learn More
The melting point of benzoic acid is 122.4 degrees Celsius. According to the National Center for Biotechnology Information, benzoic acid is also known as dracylic acid, benzeneformic acid, benzenecarboxylicacid, 65-85-0, phenylformic acid, carboxybenzene and benzenemethanoic acid.Full Answer >
Glass can be used to store things in the freezer. Glass containers can also be put in the freezer temporarily, to make a drink extra cold.Full Answer >
The melting point of stainless steel varies according to the precise chemical makeup of the particular alloy, although the spectrum runs from 1,325 to 1,530 degrees Celsius. Melting range is important in the process of manufacturing to ensure proper melting and casting.Full Answer >
The melting point of potassium chloride, or KCl, is 1,419.8 degrees Fahrenheit, or 771 degrees Celsius. Potassium chloride boils at 2,732 degrees Fahrenheit, or 1,500 degrees Celsius. The white, granular powder is odorless and tastes like salt. The substance dissolves in water and glycerin and slightly dissolves in alcohol.Full Answer >