Topic 1: States Of Matter

Question 1

DIffusion

Answer 1

is the spreading of one substance through another from a region of high concentration to a region of low concentration due to the continuous random motion of particles

Question 2

Melting point

Answer 2

is the temperature at which a pure solid changes to a liquid without a change in temperature. (water = 0oC, ethanol = -117oC)

Question 3

Boiling point

Answer 3

is the temperature at which a pure liquid changes to vapour without a change in temperature (water = 100oC, ethanol = 78oC)

Question 4

Evaporation

Answer 4

is when liquids change into gases over a range of temperature below the boiling point.

Question 5

Solidifying point/freezing point

Answer 5

is the temperature at which a pure liquid changes
to a solid without a change in temperature (water = 0oC, ethanol = -117oC)

Question 6

Condensation point

Answer 6

is the temperature at which vapour changes to a liquid without a change in temperature (water = 100oC, ethanol = 78oC)

Question 7

4 elements that can sublime

Answer 7

Iodine, Carbon Dioxide, Graphite, Ammonium chloride