Gas Laws

Question 1

Boyle’s Law (Balloon)

Answer 1

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

P1V1 = P2V2

Effects ETT cuffs, MAST trousers, Air splints, IV drip rates (increases rate)

PT with pneumocephalus (trapped air in cranial vault) will have increased intracranial pressure.

Question 2

Dalton’s Law (Partial Pressure)

Answer 2

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

Pt = P1 + P2 + P3 +… +Pn

Responsible for soft tissue swelling at altitude (uptake of inert gasses into tissue).

Question 3

Charle’s Law (Celceous)

Answer 3

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

V1 / T1 = V2 / T2

This law has vary little effect on the body.

Question 4

Henry’s Law (Heineken)

Answer 4

The quantity of Gas dissolved in 1 mL of a liquid is proportional to the partial pressure of the Gas in contact with the liquid.

Question 5

Gram’s Law (Diffusion)

Answer 5

Gas will move from higher concintration to a lower concintration.

Question 6

Gay-Lussac’s Law

Answer 6

Directly proportional relationship between temperature and pressure.

P1 / T1 = P2 / T2

Ex. You have to add air to your tire in the winter due to temperature drop.