Henry’s Law states that the amount of gas dissolved in a liquid
is proportional to the amount of pressure put on the liquid. In other
gas can dissolve into a liquid, and when there is more pressure, more
gas dissolves into the liquid. When you scuba dive, the air you breath
into your blood and tissues. When scuba diving, the deeper underwater
you dive, the more nitrogen will dissolve into your blood. Too much
in your blood is bad.
Pressure under water:
The deeper underwater a scuba diver goes, the more pressure will
be put upon them. Pressure is measured in atmospheres. When at the
pressure put upon us is one atmosphere. Underwater, at each interval
of 33 feet, another atmosphere of pressure is added. So at a depth
of 33 feet,
a diver is under the pressure of 2 atmospheres. And at depth of 66
feet, a diver is under the pressure of 3 atmospheres.
When one is under too great of a pressure, or underwater for too long,
nitrogen is dissolved into the bloodstream. More nitrogen is absorbed
into the body under these conditions because it enters faster than
it can leave
the body. This causes Decompression sickness or the bends. Bubbles
of nitrogen can get stuck in the capillaries of the body near our skin.
If the bubbles
develop near the joints, you will feel a severe pain which causes you
to bend over in agony, hence the nickname of this sickness: “the bends.” If
the bubbles form near the skin, a painful rash will develop. The only
way to treat Decompression sickness is to spend about four hours in a
chamber. However, it can be avoided by following the dive tables and
making a safety stop at 15 feet when diving.