Kinetic theory

Question 1

Kinetic refers to___

Answer 1

Motion

Question 2

The energy of an object has because of its motion is called _____

Answer 2

Kinetic energy

Question 3

What does kinetic energy explain?

Answer 3

The states of matter based on the concept that the particles in all forms of matter are in constant motion

Question 4

Do gases have attraction/repulsion?

Answer 4

No

Question 5

Do liquids have attraction/repulsion?

Answer 5

Yes

Question 6

Relationship between Kinetic Energy and Temperature?

Answer 6

Direct

Question 7

Why is the relationship between KE and T direct?

Answer 7

Because when there’s an increase in temperature, the molecules move faster, so more KE.

Question 8

What temperature is when the motion of particles stops?

Answer 8

0 K

Question 9

Is 0K obtainable at real conditions?

Answer 9

No, it’s impossible to do

Question 10

The 3 assumptions of the kinetic theory:

Answer 10

1. Gas particles are small, hard spheres with no volume and no attraction/repulsion
2. Particles in a gas move rapidly in constant random motion but always in straight paths, only changing directions when colliding with one another/objects
3. Collisions are perfectly elastic.

Question 11

What’s it mean if a gas’ collisions are perfectly elastic?

Answer 11

No KE is lost when particles collide

Question 12

What is gas pressure?

Answer 12

The force exerted by a gas per unit surface area.

Question 13

What does gas pressure result from?

Answer 13

The collisions of gas particles with objects.

Question 14

What is the SI unit of pressure?

Answer 14

The pascal (Pa)

Question 15

1 atm= how many mmHg/torr

Answer 15

760 mmHg/torr

Question 16

760 mmHg/torr=how many kPa

Answer 16

101.3 kPa

Question 17

What equipment is used to measure atmospheric pressures?

Answer 17

Barometers

Question 18

What equipment is used to measure gas pressure?

Answer 18

Manometers

Question 19

What is the conversion of a liquid to a gas called?

Answer 19

Vaporization

Question 20

How does evaporation occur?

Answer 20

When a liquid turns to a gas at the SURFACE of a liquid that is NOT boiling.

Question 21

Does vaporization occur at boiling point?

Answer 21

YES

Question 22

Volatile liquids

Answer 22

Liquids that evaporate at room temperature

Question 23

Examples of volatile liquids?

Answer 23

Water, gasoline.

Question 24

What type of process is evaporation?

Answer 24

COOLING

Question 25

Why is evaporation a coolig process?

Answer 25

B/c particles with the highest energy escape first!

Question 26

Example of why evaporation is a cooling process?

Answer 26

Sweat particles

Question 27

Define the boiling point

Answer 27

The temperature at which the vapor pressure of the liquid is EQUAL to the external pressure on the liquid.

Question 28

The boiling point changes if the external pressure changes!

Answer 28

yes

Question 29

what is the pressure of the boiling point

Answer 29

1 atm

Question 30

are solids compressible or incompressible?

Answer 30

Incompressible

Question 31

What’s the similaraity between the melting point and freezing point?

Answer 31

They’re the same temperature.

Question 32

Why do all ionic solids have high melting points

Answer 32

Due to the relatively strong forces holding them together