Gas Laws

Question 1

The pressure of a gas is inversely proportional to the volume of a gas at a constant temperature.

Answer 1

Boyle’s Law
(With higher altitudes, gases expand)

Question 2

At a constant pressure, the volume of a gas is directly proportional to the absolute temperature of the gas.

Answer 2

Charles Law
(Air expands when hot. Best aircraft life in cold, dry air)

Question 3

The total pressure of a gas mixture is the sum of the partial pressures of all the gases in the mixture.

Answer 3

Dalton’s Law
(Dalton’s Gang)
As altitude increases, partial pressure decreases—supplemental O2 is needed.

Question 4

Gas diffusion across the alveoli.

Answer 4

Fick’s Law of diffusion
When adding FIO2 and PEEP-partial pressure and surface area increase, thickness of capillary membrane will decrease.

Question 5

Solubility of gas in a liquid. Affects divers, can lead to decompression sickness “the bends”

Answer 5

Henry’s Law
Diving adds pressure, when surfacing nitrogen comes out of solution.

Question 6

Directly proportional relationship between temperature and pressure.
Ex: o2 cylinder left outside overnight will have lower pressure due to temperature drop.

Answer 6

Gay-Lussac’s Law

O2 tank pressure changes, colder at flight level.

Question 7

The rate of diffusion of a gas through a liquid is directly related to the solubility of the gas.

Answer 7

Graham’s Law

Bigger the molecule the slower it diffuses.

Question 8

1 ATM is hoe many Torr?

Answer 8

760 torr