Chapter 2-Gases & Gas Mixtures
Gases & Gas Mixtures
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CHAPTER 2: GASES AND GAS MIXTURES - KNOWLEDGE REVIEW
1. Each of the individual components in a gas mixture will exert its chemical or physical effects independently,
according to ____________________________________.
2. We say that oxygen is ________% of atmospheric air and that that nitrogen is __________% of air.
3. The symptoms of nitrogen narcosis parallel those often seen in _____________________.
4. If we heat a gas, we are adding ________________, increasing the speed of the molecules and the force
of the impacts.
5. Boyle’s Law states: “At a constant temperature, the _____________ of a gas varies ______________
with __________________, while the ______________ of a gas varies ______________ with
________________.”
6. Henry’s Law states: “The amount of any given gas that will dissolve in a liquid at a given temperature is a
function of the __________________________________________________________
_____________ and the solubility coefficient of the gas in the particular liquid.”
7. The partial pressure of a gas in a mix is ___________________________________________.
8. Dalton’s law states: “The total pressure exerted by a mixture of gases is equal to ___________________
______________________________________________________________________
_____________________________________________________________________.”
9. Each __________________________________ that you descend in the ocean adds another atmosphere
of pressure to the one atmosphere of surface pressure.
10. When you are at a depth 20 meters of seawater (msw) / 66 feet of seawater (fsw), the absolute pressure is
_________________________________.
11. To convert depth to absolute pressure, you first find the water (hydrostatic) pressure in atmospheres and then
add ____________________________________________.
12. To determine the partial pressure of a gas in a mixture, multiply the ______________________ by
the __________________________.
13. Using the “Oxygen Partial Pressure at Depth” table, what is the PO2 of EAN34 at a depth of 24 msw (80 fsw)?
________________________.