How can you identify extensive and intensive properties?

1
How can you identify extensive and intensive
properties?

• An extensive property is a property that depends
  on the amount of matter in a sample. Mass and
  volume are examples of extensive properties.
• An intensive property is a property that depends
  on the type of matter in a sample, not the amount
  of matter.
• Every sample of a pure substance has identical
  intensive properties because every sample has the
  same composition. Hardness, color, conductivity,
  and malleability are examples of intensive
  properties.

1. Identify A student measures out a sample of
sucrose (table sugar) for an experiment. What are
some extensive properties of the sample? What are
some intensive properties of the sample?
2
How can you differentiate between physical and
chemical changes?

• During a physical change, some properties of a
  material change, but the composition of the
  material does not change.
• Examples of reversible physical change include
  melting, freezing, boiling, condensing, and
  evaporating.
• Examples of irreversible physical change include
  breaking, splitting, grinding, crushing, and
  cutting.

2. Describe List some common physical changes
that take place when you cook a meal. Identify
which changes are reversible and which are
irreversible.
(contd.)
3

• Chemical properties can be observed only when a
  chemical change occurs.
• During a chemical change, the composition of
  matter always changes. A chemical change is also
  called a chemical reaction.
• Possible clues to chemical change include a
  transfer of energy, a change in color, the
  production of a gas, and the formation of a
  precipitate.

3. Describe List some chemical changes that take
place when you cook a meal. For each change,
describe observable clues to support the
conclusion that a chemical change is occurring.