Every athlete - the diver must be able to calculate the partial pressure of gases in compressed air. This will help him to evaluate the action of gases on the body, which varies greatly depending on the partial pressure.
Each descent under water diver is to use compressed air for breathing. To determine the time spent under water, depending on the
reserve air cylinders and the depth of descent is necessary to know the basic physical laws governing gases.
In contrast to the solid gas has no shape and occupies a volume of the vessel in which it was concluded. In this case, whatever amount of gas may be enclosed in a vessel, the gas is always (it tends to expand and occupy the largest amount) and evenly distributed throughout the vessel.
Another important property of gas is its ability to compress under pressure and to reduce its original volume. When swimming underwater breathing apparatus, and charging these vehicles with compressed air must take into account changes in air temperature, otherwise the calculations would be a mistake.
It is known that at the same pressure increase the gas temperature leads to an increase in its volume. The provision is formulated in the form of Gay-Lussac's Law, which states that the volume of a given mass of gas at constant pressure is directly proportional to temperature. The same relationship exists between the gas pressure and temperature at constant volume.
Knowing the relationship between pressure, volume and temperature of gases can be calculated, as will pressure to change its gas at constant volume (for example, in the container-contained breathing apparatus) in the event of an increase or decrease the temperature or how much gas will vary with temperature and constant pressure. |
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