How do scuba divers use the laws and principles of the behavior of gases to their advantage?

Answer 1

Because a large volume of air can be compressed into a little volume cylinder, the use of Scuba Gear is well-liked to those that wish to go diving deep and, for an extended period, perhaps for an hour or more depending on the quantity of air compressed into the cylinder. The following is based primarily on the Inverse Pressure and Volume, Boyle's Law

At the surface, the atmospheric pressure is 1atm. Absolute or 14.7Psia.

For every 34 feet (10m) of depth beneath the surface, the pressure increases by 1 atm.

30 meters down the total pressure is 4atm. Absolute (58.8psi).

The Air Regulator of the Scuba program keeps the supply to the diver at a pressure equal to the pressure the diver is at.

His entire body such as his blood program is at this pressure.

His body program is therefore under a significantly higher pressure than at the surface.and the air in his blood program is the same.

When the diver is returning to the surface, he must do so extremely slowly and breathe normally to allow his body to maintain equalising with the decreasing pressure. If he comes up too fast, Nitrogen (and other gases), in solution in the blood forms bubbles in the blood and outcomes in 'The Bends' as the bubbles collect in tissues and joints and build up pressure causing severe pain, cramps and even death. Divers, after lengthy submergence, sometimes have to go into a 'Decompression' chamber to ensure all the high pressure dissolved gases have been eliminated