P3

Question 1

Give 4 properties of solids.

Answer 1

1. have a fixed regular arrangement
2. all particles are touching
3. vibrate in a fixed position
4. have string intermolecular forces of attraction

Question 2

Give 3 properties of liquids.

Answer 2

1. have a random structure
2. all particles are touching
3. the particles can move

Question 3

Give 3 properties of gases>

Answer 3

1. have a random structure
2. the particles do not touch
3. have weak inter- molecular forces of attraction

Question 4

what forces of attraction is in a solid?

Answer 4

strong intermolecular forces of attraction

Question 5

what forces of attraction is in a liquid?

Question 6

what forces of attraction are in a gas?

Answer 6

weak intermolecular forces of attraction

Question 7

do solid have a high or low density? why?

Answer 7

high density
- because the particles are arranged close together

Question 8

can solids flow? why?

Answer 8

no because the particles are in a fixed position

Question 9

are solids compressible or incompressable why?

Answer 9

incompressable - because the particles are touching and there are no gaps in between

Question 10

do liquids have a high or low density? why?

Answer 10

high density
- because the particles are arranged close together

Question 11

can liquids flow? why?

Answer 11

yes - because they have a weaker intermolecular force of attraction so their particles can move

Question 12

are liquids compressible or incompressible? why?

Answer 12

incompressible - because the particles are touching so little gaps in between

Question 13

do gases have a high or low density?

Answer 13

low density - because the particles are spaced out and occupy a large volume

Question 14

can gases flow?

Answer 14

yes - because they have weak intermolecular forces of attraction

Question 15

what are 4 limitations of the particle model?

Answer 15

1. doesn’t show the motion of the particles
2. the model is 2D but states of matter are 3D
3. drawn as spheres but that’s not how they actually look
4. doesn’t show the forces of attraction between the particles

Question 16

what is the definition of denisty?

Answer 16

the mass per unit volume

Question 17

what sate of matter is the most dense?

Answer 17

solids

Question 18

what is the definition of resolution?

Answer 18

the smallest change in a quantity that will result in the change in the measurement being taken

Question 19

what is the definition of uncertainty?

Answer 19

a measurement of the range of which the true value will lie

Question 20

what is the definition of temperature?

Answer 20

the average kinetic energy of the molecules/ atoms

Question 21

what is the definition of thermal energy?

Answer 21

the total energy of an object due to the kinetic energy of the atoms or molecules

Question 22

what does thermal energy depend on?

Answer 22

the mass of the object

Question 23

what internal energy?

Answer 23

the sum of the kinetic energy and potential energy

Question 24

what does potential energy depend on?

Answer 24

due to their intermolecular forces of attraction acting on the particles

Question 25

All objects above absolute zero have...

Answer 25

thermal energy as particles are moving

Question 26

The more mass an object has ...

Answer 26

the more atoms it has

Question 27

What happens when you heat a system?

Answer 27

the internal energy increases

Question 28

what happens to the temperature when a substance changes state?

Answer 28

there is no change in temperature

Question 29

what happens to the potential energy store when ice melts?

Answer 29

it increases

Question 30

which states have the most/least internal energy?

Answer 30

solids have the least gases have the most

Question 31

what happens when a substance is cooled?

Answer 31

the internal energy decreases

Question 32

what happens when a substance is heated?

Answer 32

the internal energy increases

Question 33

what happens to the potential energy when a solid turns to liquid (melting)

Answer 33

potential energy increases - there are less intermolecular forces of attraction

Question 34

what happens to the potential energy when a gas turns to liquids (condensation)

Answer 34

the potential energy store decreases

Question 35

what is specific latent heat? 9check correct definition)

Answer 35

the amount of energy required to change the state of 1kg of a material without changing it's temperature

Question 36

what is the specific latent heat of fusion?

Answer 36

the energy required to convert 1 kg of a substance from a solid to a liquid/ or from a liquid to a solid without changing it's temperature

Question 37

what is the specific latent heat of vapourisation?

Answer 37

the energy required to convert 1kg of a substance from a liquid to gas ( or a gas to liquid) without changing it's temperature

Question 38

what is the definition of pressure?

Answer 38

a force per unit area

Question 39

what 2 things does pressure depend on?

Answer 39

1. the frequency of collisions 2. the individual force that each particle in the container collides with

Question 40

describe the relationship between gas pressure and the temperature

Answer 40

gas pressure is directly proportional to the temperature

Question 41

how do gas particles move?

Answer 41

in constant and random motion

Question 42

what happens when gas particles bump into each other?

Answer 42

they collide and bounce of each other

Question 42

do each gas particles have their own mass?

Answer 42

yes

Question 43

are gas particles extremely small?

Answer 43

yes

Question 44

do gas particles have inter - molecular forces of attraction between them?

Answer 44

no