P1- Particle model of matter

Question 1

Density

Answer 1

Tells you how much mass is packed into a given volume of space.

Question 2

Density equation

Answer 2

Mass(kg/g) / Volume(cm3/m3)

Question 3

Method to determine the density of a regular object

Answer 3

Measure mass using a balance, measure the sides of the block using a ruler, calculate the volume using l x w x h and use the density equation to work out the density

Question 4

Method to determine the density of an irregular object

Answer 4

Measure mass of irregular object with a balance. Fill the eureka can with water up to the spout, carefully submerge the object into the water (lower using string), collect displaced water into a measuring cyclinder, displaced water= volume of object, use density equation

Question 5

Method to determine the density of a liquid

Answer 5

Place measuring cylinder on a balance, zero balance reading, pour in a volume of liquid, read off the scale (1ml=1cm3), record mass of balance in grams, use density equation (mass/volume)

Question 6

Arrangement of particles in a solid

Answer 6

Regular

Question 7

Arrangement of particles in a liquid

Answer 7

Irregular

Question 8

Arrangement of particles in a gas

Answer 8

Random

Question 9

Is there space between the particles in a solid

Answer 9

No

Question 10

Is there space between the particles in a liquid

Answer 10

No

Question 11

Is there space between the particles in a gas

Answer 11

Yes

Question 12

Movement of particles in a solid

Answer 12

Vibrate about fixed positions

Question 13

Movement of particles in a liquid

Answer 13

Move loosely around eachother

Question 14

Movement of particles in a gas

Answer 14

Move in random speeds in random directions

Question 15

Forces of attraction between particles in a solid

Answer 15

Strong

Question 16

Forces of attraction between particles in a liquid

Answer 16

Weakened (bonds have loosened)

Question 17

Forces of attraction between particles in a gas

Answer 17

Virtually zero

Question 18

Density of a solid

Answer 18

High

Question 19

Density of a liquid

Answer 19

Medium

Question 20

Density of a gas

Answer 20

Low

Question 21

If an object is more dense than the liquid it is in, what will happen

Answer 21

It will sink

Question 22

If an object is less dense than the liquid it is in, what will happen

Answer 22

It will float

Question 23

What kind of changes are state changes

Answer 23

Physical changes, they can be reversed

Question 24

What will mass always be in a state change

Answer 24

Conserved (the same)

Question 25

Does temperature change in a state change

Answer 25

No, the energy goes into creating and breaking the bonds

Question 26

3 limitations of the particle models

Answer 26

They assume particles are all spherical, they are only 2D and no movement or vibrations are shown

Question 27

What is internal (thermal) energy

Answer 27

The energy stored by the particles making up a system

Question 28

What does heating a system do

Answer 28

It transfers energy to its particles which increases the internal energy and leads to a change in temperature or state

Question 29

When does a change of state occur

Answer 29

If a substance is heated enough

Question 30

Solid to liquid process

Answer 30

Melting

Question 31

Liquid to gas process

Answer 31

Evaporation

Question 32

Gas to liquid process

Answer 32

Condensation

Question 33

Solid to gas process

Answer 33

Sublimation

Question 34

Liquid to solid process

Answer 34

Freezing

Question 35

What is Specific Latent Heat

Answer 35

The amount of energy required for 1kg of mass to change state

Question 36

What is Specific Latent Heat of Fusion

Answer 36

The specific latent heat (energy needed for 1kg of a substance) for changing between a solid and a liquid

Question 37

What is Specific Latent Heat of Vapourisation

Answer 37

The specific latent heat (energy needed for 1kg of a substance) for changing between a liquid and a gas

Question 38

Equation for energy for a change of state

Answer 38

Energy for a change of state= mass x specific latent heat

Question 39

If you increase the temperature of a gas, what happens

Answer 39

You transfer energy into the kinetic energy stores of its particles, meaning the speed of the particles increase and also the pressure

Question 40

What does colliding gas particles create

Answer 40

Pressure

Question 41

What is the relationship between pressure and volume

Answer 41

Inversely proportional

Question 42

What does doing work on a gas increase

Answer 42

Temperature

Question 43

Pressure equation

Answer 43

Pressure= Force/ Area

Question 44

Pressure and volume equation

Answer 44

Pressure x Volume = Constant