Gas Laws

Question 1

Boyles Law

Answer 1

States that at a constant temperature, the absolute pressure and the volume of a gas are inversely proportional

Question 2

How is boyles law used in diving?

Answer 2

As a diver goes deeper in depth pressure increases while volume decreases. As a diver ascends volume increases while pressure decreases.

Question 3

Charles’/Gay-Lusacc’s law

Answer 3

States that at a constant pressure, the volume of a gas is directly proportional to the change in absolute temperature.

Question 4

How is Charles’ / Gay - Lusaccs’ used in diving

Answer 4

Scuba bottle at 3000 psi in room temperature, if left out in sun pressure will increase

Question 5

The general gas law

Answer 5

Boyles’, Charles and gay lusacc gas laws combined make-up the general gas law. Temperature, volume, and pressure, affect a gas in such a way that a change in one factor must be balanced by a corresponding change in one or both of the others.

Question 6

How is general gas law used in diving

Answer 6

Used to relate changes in volume, pressure and temperature caused by a change in one or both of the others.

Question 7

Dalton’s Law

Answer 7

The total pressure exerted by a mixture of gases is equal to the sum of the pressures of each of the different gases making up the mixture, with each gas acting as if it alone was present and occupied the total volume.

Question 8

How is Dalton’s law used in diving

Answer 8

Used to determine the partial pressure of gases at depth.

Question 9

Henry’s Law

Answer 9

The amount of any given gas that will dissolve in a liquid at a given temperature is directly proportional to the partial pressure of that gas.

Question 10

How is Henry’s law used in diving

Answer 10

As a diver dives deeper and deeper more gas will dissolve in the body tissues and that upon ascent, the dissolved gas must be released.

Question 11

Archimedes principle

Answer 11

Any object wholly or partly immersed in a fluid is bouyed up by a force equal to the weight of the fluid displaced by an object.

Question 12

How is Archimedes principle used in diving

Answer 12

Used to determine positive, neutral, and negative buoyancy. If total displacement is greater than weight of the submerged object the buoyancy is positive.

• KM- 37 total displacement is equal to the weight so it has neutral buoyancy.

Question 13

Kinetic theory of gases

Answer 13

The kinetic energy of any gas at a given temperature is the same as the kinetic energy of any other gas at the same temperature.