States Of Matter !

Question 1

what is the arrangement of a solid?

Answer 1

• close together
• regular pattern
• regular lattice arrangement
• fixed volume and shape
• strong forces of attraction

Question 2

what is the arrangement of a liquid?

Answer 2

• close together
• random arrangement
• have enough energy to move around
• take the shape of the container they are in
• fixed volume
• no definite shape
• medium forces of attraction

Question 3

what is the arrangment of a gas?

Answer 3

• far apart
• random arrangement
• no fixed volume
• no fixed shape
• weak forces of attraction

Question 4

movement of a solid?

Answer 4

vibrate and rotate on the spot in their fixed positions

Question 5

movement of a liquid?

Answer 5

move around each other, exchanging positions within the liquid

Question 6

movement in a gas?

Answer 6

move quickly in random directions, expand and compress to adapt to their containers shape and size

Question 7

properties of a solid?

Answer 7

• strong forces of attraction, which holds them in fixed positions to form a very regular lattice arrangement
• definite shape and volume
• vibrate around their positions; the hotter, the more they vibrate, causing solids to expand slightly when heated

Question 8

properties of a liquid?

Answer 8

• weak force of attraction, so they are randomly arranged and free to move past each other, but tend to stay close together
• have definite volume but not definite shape
• constantly moving with random motion - the hotter they get, the fastet they move. this causes liquids to expand slightly when heated

Question 9

properties of a gas?

Answer 9

• forces of attraction are very weak, so particles are free to move and are far apart. they travel in straight lines.
• no definite shape, no definite volume, will always fill a container
• move constantly with random motion. the hotter they get they faster they move, causing gases to expand or increase in pressure when heated.

Question 10

interconvert

Answer 10

change from one state to the other

Question 11

to change state, what must happen?

Answer 11

heat must be supplied. the heat provides the particles with enough energy to overcome the bonds and forces of attraction between the particles which are holding them together

when cooling is involved, the particles lose kinetic energy and come close together and form new bonds

Question 12

what happens at the melting point?!

Answer 12

the strong forces of attraction holding the particles together are broken

Question 13

evaporation

Answer 13

the particles in a liquid move around and have different energies, so some are moving faster than others. the faster particles have enough energy to escape from the surface of the liquid and change into the gaseous state. the rate of evaporation increases with temperature as heat gives more particles the energy to be able to escape

Question 14

as a substance is heated it

when it is cooled it

Answer 14

absorbs energy

loses energy to its surroundings