Chapter 10 Review

Question 1

Are gases polar?

Answer 1

Gases are nonpolar or slightly polar

Question 2

Are there many elements that are gases at room temperature?

Answer 2

Only a few elements are gases at room temperature

Question 3

What type of mixture do gases tend to form?

Answer 3

Gases tend to form homogeneous mixtures

Question 4

Are gases very dense?

Answer 4

Gases tend to have low densities

Question 5

Do gases have a definite shape or volume?

Answer 5

No, gases don’t have a definite shape or volume

Question 6

What variables affect Volume?

Answer 6

Temperature, pressure, and moles present affect the volume

Question 7

Is the volume of a container equal to the volume of the gas?

Answer 7

Yes, the volume of the gas is equal to the volume of the container

Question 8

Are gases highly compressible?

Answer 8

Yes, gases are highly compressible

Question 9

When heated, what do gases do?

Answer 9

When heated, gases expand

Question 10

What is a vapor?

Answer 10

A vapor is a gas that is a liquid or a solid at room temperature

Question 11

What causes gas pressure?

Answer 11

Molecular collisions cause gas pressure

Question 12

What is atmospheric pressure?

Answer 12

Atmospheric pressure is the pressure exerted by the combined gases above the earth’s surface

Question 13

Is atmospheric pressure dependent on altitude?

Answer 13

Yes, atmospheric pressure is dependent of altitude

Question 14

One atmospheric pressure is how many mmHg?

Answer 14

1 atm = 760 mmHg

Question 15

How many torr is 1 mmHg?

Answer 15

1 mmHg = 1 torr

Question 16

How many torr is 1 atm?

Answer 16

1 atm = 760 torr

Question 17

How many kPa is 1 atm?

Answer 17

1 atm = 101.3 kPa

Question 18

What is Boyle’s Law?

Answer 18

P1V1=P2V2

Question 19

When pressure INCREASES, does volume INCREASE or DECREASE?

Answer 19

When pressure increases, volume DECREASES

Question 20

When pressure DECREASES. does volume INCREASE or DECREASE?

Answer 20

When pressure decreases, volume increases

Question 21

What is Charle’s Law?

Answer 21

V1/T1 = V2/T2

Question 22

When volume increases, what does temperature do?

Answer 22

Temperature increases

Question 23

When volume decreases, what does temperature do?

Answer 23

Temperature decreases

Question 24

What must temperature’s unit be?

Answer 24

Temperature must be in Kelvin

Question 25

If the temperature of a gas is 0K, does the gas have volume?

Answer 25

If the temperature is 0K, the gas has no volume

Question 26

What is Gay-Lussac's law?

Answer 26

P1/T1 = P2/T2

Question 27

As pressure increases, what does temperature do?

Answer 27

Temperature increases

Question 28

As pressure decreases, what does temperature do?

Answer 28

Temperature decreases

Question 29

Will gases at the same temperature and pressure have the same number of moles?

Answer 29

Gases with the same pressure and temperature will have the same number of moles

Question 30

What is Avogadro's law?

Answer 30

V1/n1 = V2/n2

Question 31

As volume increases, does the amount of moles increase or decrease?

Answer 31

The number of moles increases

Question 32

As volume decreases, does the amount of moles increase or decrease?

Answer 32

The number of moles decreases

Question 33

What is the Combined Gas law?

Answer 33

P1V1/n1T1 = P2V2/n2T2

Question 34

What is the ideal gas law?

Answer 34

PV=nRT

Question 35

What is R in the ideal gas law?

Answer 35

R = 0.08206 L*atm/mol*K

Question 36

When should we use the ideal gas law?

Answer 36

When we are given 3 variables and don't know 1 variable

Question 37

What does the ideal gas law assume?

Answer 37

That two atom's don't affect each other and the volume of gas particles is negligible

Question 38

What is STP?

Answer 38

STP is 273.15K and 1.00atm

Question 39

What is the molar volume of a gas at STP?

Answer 39

V / n

Question 40

What is the molar volume of ANY ideal gas at STP?

Answer 40

22.414 L/mol

Question 41

What is the density of a gas?

Answer 41

d = PM / RT

Question 42

As pressure increases, what does density do?

Answer 42

Density increases

Question 43

As temperature increases, what does density do?

Answer 43

Density decreases?

Question 44

What is the total pressure of a gas mixture equal to?

Answer 44

The partial pressure of each gas present in the mixture

Question 45

To find the partial pressure of a gas in a mixture given the moles of each gas, what does one do?

Answer 45

Divide moles of gas by the total moles in the mixture. Multiply that by the total pressure

Question 46

H

Answer 46

H