Gas Laws

Question 1

Boyles Law

Answer 1

P1V1 = P2V2

Question 2

Charles Law

Answer 2

V1 / T1 = V2 / T2

Question 3

Gay Lussac Law

Answer 3

P1 / T1 = P2 / T2

Question 4

Dry volume of gas is (greater/less) than the saturated volume.

Answer 4

less than

Question 5

The pressure exerted by water is independent of the other gases with which it mixes. What 2 things effect vapor pressure?

Answer 5

temperature and relative humidity

Question 6

Water vapor pressure has what effect on the partial pressure of other gases present?

Answer 6

When water vapor is present, it lowers the partial pressure of the other gases present

Question 7

Pressure is defined as:

Answer 7

the force exerted per unit area of surface

Question 8

If gas in a container is compressed by adding pressure, does this change the mass? The volume? The density?

Answer 8

Mass remains unchanged.
Volume decreases
Density becomes greater (D= M/V)

Question 9

Boyles law states that volume and pressure are ____ related when temperature is constant

Answer 9

inversely

Question 10

Charles law states that at constant pressure, the volume a fixed weight of gas occupies is _____ related to the absolute temperature.

Answer 10

directly proportional

Question 11

Gay-Lussac law states that at constant volume, the pressure of gas is _____ related to the Kelvin temperature.

Answer 11

directly proportional

Question 12

An autoclave utilizes which gas law principles?

Answer 12

Gay-Lussac

Question 13

The action of a syringe illustrates which gas law principle?

Answer 13

Boyles Law

Question 14

A mole contains how many atoms/molecules?

Answer 14

6.023 x 10 ^23

Question 15

The partial pressure of gases must be proportional to its percentage in a mixture describes what?

Answer 15

Daltons law of partial pressure

Question 16

Doubling the number of gas particles in a container does what to the pressure in the container?

Answer 16

Increases by the same factor, ie it doubles the pressure

Question 17

To completely describe the quality of a gas, what 4 things must be measured?

Answer 17

Pressure, temperature, volume, number of particles

Question 18

The kinetic energy of gas is directly related to what?

Answer 18

its temperature as measured in Kelvin units

Question 19

When is gas behavior most ideal?

Answer 19

At low pressures and high temperatures

Question 20

What is the density of gas?

Answer 20

Gases have very low densities- no volume, lots of empty space. They only acquire density under pressure

Question 21

The relationship of gas pressure to the number of moles present is _________.

Answer 21

Direct relationship (more moles = more collisions, greater pressure, fewer moles, less collisions, less pressure

Question 22

The only way to increase the temperature of a gas at constant pressure to to change what?

Answer 22

increase the volume

Question 23

What is the formula for determining pressure?

Answer 23

Pressure = force / area

Question 24

What is STPD?

Answer 24

0 celcius, 1 atm (or 273 K, 101.3 kPa)

Question 25

Spreading of gas molecules throughout a container until evenly distributed is called ___?

Answer 25

diffusion

Question 26

Passing of gas molecules through a tiny opening in a container is called ____?

Answer 26

effusion

Question 27

Kinetic energy is determined by what property?

Answer 27

temperature

Question 28

What moves faster, heavy or light molecules?

Answer 28

light molecules move faster

Question 29

Rate of diffusion of a gas is inversely related to the square root of its molar mass is _____ law.

Answer 29

Grahams

Question 30

Solubility and partial pressure of a gas determines how much will _____in a liquid at a given temperature is ______ law.

Answer 30

dissolve, Henry's Law

Question 31

The solubility coefficient for O2 at STPD is

Answer 31

0.023 ml/ml

Question 32

The solubility coefficient for CO2 at STPD is

Answer 32

0.510 ml/ml

Question 33

What is Reynold's number? (definition)

Answer 33

numerical value that determines whether flow through a tube will be turbulent or laminar

Question 34

What is the formula for determining the Reynold's number?

Answer 34

RN= velocity x density x diameter of tube / | viscosity

Question 35

An increased flow rate or increased gas density will (increase/decrease) the R number?

Answer 35

increase

Question 36

An R value of less than ______ means that flow is laminar

Answer 36

2,000

Question 37

Poiseuilles law shows the ____ relationship between the work of breathing and the radius of the airway

Answer 37

inverse

Question 38

The pressure difference needed for ____ flow through a tube is related to fluid viscosity, length of tube, rate of flow, and tube radius.

Answer 38

laminar

Question 39

The pressure difference needed for laminar flow through a tube is related to fluid ____, length of tube, tube radius, and rate of flow.

Answer 39

viscosity

Question 40

Liquid molecules exert ____force in all directions is a principle credited to who?

Answer 40

equal, Pascal

Question 41

How do you determine the static pressure of a liquid?

Answer 41

PL= h x dw | Liquid static pressure = height of the liquid x density (weight)