Chemistry........I mean physics....no I mean chemistry......... (solid liquid and gas)

Question 1

Solids (Shape and volume)

Answer 1

> Definite shape
Definite volume

Question 2

Liquids (Shape and volume)

Answer 2

> No definite shape (will take shape on container)
Fixed volume

Question 3

Gasses (Shape and volume)

Answer 3

> No definite shape (take shape of container)
No definite volume (will expand to fill container)

Question 4

Solid (molecules)

Answer 4

• Molecules are very close (in a lattice)
• They vibrate about a fixed position

Question 5

Liquid (Shape and volume)

Answer 5

• Molecules close (no longer in a lattice but close)
• They slide over each other

Question 6

Gas (Shape and volume)

Answer 6

• Molecules widely separated
• They move randomly and fast

Question 7

Solid (Bonds)

Answer 7

• The molecules intermolecular bonds are strong

Question 8

Liquid (Bonds)

Answer 8

• Intermolecular bonds are weaker
• The molecules slide past each other

Question 9

Gas (Bonds)

Answer 9

• Almost 0 intermolecular bonds
• The molecules move around randomly at high speed
• Easily compressed

Question 10

The molecules in a gas move faster if ______

Answer 10

It’s heated

Question 11

To increase the pressure of a gas you can _________

Answer 11

Compress the gas or heat it up
(When you compress it, it heats up)

Question 12

Brownian motion e.g.

Answer 12

Pollen in water
Smoke in air

Question 13

What is Brownian motion?

Answer 13

The erratic motion of small particles when observed through a microscope

Question 14

Evaporation (meaning)

Answer 14

Changing state from liquid to gas

Question 15

evaporation happens when _____________

Answer 15

More energetic molecules near the surface of a liquid escape

Question 16

What affects the rate of evaporation?

Answer 16

Temp (higher temp quicker evaporation)
Surface of the liquid (Surface bigger evaporation quicker)
Air (More air moving across more molecules escape)

Question 16

What affects the rate of evaporation?

Answer 16

Temp (higher temp quicker evaporation)
Surface of the liquid (Surface bigger evaporation quicker)
Air (More air moving across more molecules escape)

Question 17

What happens to most materials when heated?

Answer 17

They expand (Because the molecules start moving faster which cases them to push each other)