THE PARTICULATE NATURE OF MATTER

Question 1

What is a volatile liquid?

Answer 1

The liquid that evaporates quickly and has a low boiling point

Question 2

If the substance is impure the melting point will________ & the boiling point will________.

Answer 2

The melting point will decrease & the Boiling point will increase

Question 3

The impurity can reduce the_______of the Mp. & Bp. of a substance.

Answer 3

Sharpness

Question 4

The presence of an impurity means that the mp.& bp. will__________

Answer 4

spread over a range of temperatures

Question 5

Does cooling give out energy or does it take in energy? What about heating?

Answer 5

Cooling gives out energy and heating takes in energy

Question 6

In a cooling curve when does the temp. stay constant?

Answer 6

The temp. will stay constant when the gas condenses and the liquid freezes.

Question 7

What is a solution?

Answer 7

Its a mixture consisting of a solute that dissolves in the solvent.

Question 8

What effect does an impurity have on the freezing point of a liquid?

Answer 8

Freezing pointing & the melting point of a pure substance is the same, therefore it will decrease.

Question 9

Name two factors that affect the rate of evaporation, and explain.

Answer 9

The larger the surface area the faster the liquid evaporates, the warmer the liquid the faster it evaporates.

Question 10

Define the word matter.

Answer 10

Matter is anything that has mass and takes up space.

Question 11

Name 2 solids that sublime

Answer 11

Carbon dioxide & Iodine