2 kimeric particle theory

Question 1

sublimation

Answer 1

the change of substances from a solid to a gas directly

Question 2

vapour disposition

Answer 2

the opposite of sublimation
particles in gas are cooled until they slow down and arrange themselves directly into the solid state

Question 3

example of vapour disposition

Answer 3

when iodine vapour comes okto contact with a cold glass surface, iodine crystals are formed

Question 4

diffusion

Answer 4

the net movement of articles form a region or higher concentration to a region of lower concentration

Question 5

movement of particles in gases

Answer 5

sir consists of tiny particles of different types of gases which ,over about freely and quickly

Question 6

conditions affecting rate of diffusion

Answer 6

temperature and particle mass

Question 7

effect of temperature on diffusion

Answer 7

rate on diffusion increases as temperature increases.
more thermal energy is converted to kinetic energy of the particles

Question 8

effect of particle mass

Answer 8

as the particle mass increases, the rate of diffusion will decrease.
particles with higher mass require more kinetic energy to move at the same speed

Question 9

particle movement in tea

Answer 9

1.when tea bag is placed in water, particles or req diffuse out of bag into water
2.particles of tea move away from the bag and towards regions liquid that have lower concentration of tea
3.eventually, concentration of tea becomes same throughout the cup

Question 10

particle movement in perfume

Answer 10

1.liquid perfume is sprayed out of the bottle, the more volatile substances vaporise almost immediately. the other substances fall as liquids onto the surface of the skin
2. perfume vapour diffuses away from the bottle. through the air and eventually into our noses. at higher temperatures, the vapour s diffuse faster and we can detect the fragrance more quickly.