Particle Theory

Question 1

describe the arrangement and motion of particles in a gas

Answer 1

random arrangement. no particles touching. moving quickly and in all directions

Question 2

describe the forces of attraction of particles in a solid, liquid and a gas

Answer 2

solid- strong forces of attraction
liquid- weaker force of attraction
gas- no force of attraction
for liquids and gases the phrase intermolecular force can be used

Question 3

why are liquids incompressible

Answer 3

there are no spaces between the particles of a liquid

Question 4

why do particles of a gas fill the volume of a container

Answer 4

particles have no intermolecular force so move quickly and in all directions

Question 5

why do solids have a fixed shape

Answer 5

particles have strong forces of attraction between them meaning they can only vibrate about fixed points

Question 6

why do liquids and gases expand when heated

Answer 6

particles Gain energy, they move faster and further apart

Question 7

describe the arrangement and motion of particles in a solid

Answer 7

all touching in rows. particles vibrate around a fixed point

Question 8

describe condensation

Answer 8

particles in a gas hit a cooler surface. They lose energy to the surface and change to particles in a liquid

Question 9

describe evaporation

Answer 9

particles with enough energy overcome the forces of attraction between particles in a liquid and become gas particles

Question 10

describe the arrangement and motion of particles in a liquid

Answer 10

random arrangement with at least 50% touching. Particles move around each other