1.3 Physical and Chemical Properties

Question 1

What are physical properties

Answer 1

A physical property is a characteristic of matter that is not associated with a change in its chemical composition.

• density
• color
• hardness
• melting and boiling points
• electrical conductivity

Question 2

what is a physical change?

Answer 2

A physical change is a change in the state or properties of matter without any accompanying change in its chemical composition

• when wax melts
• when sugar dissolves in coffee
• when steam condenses into liquid water
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Question 3

what are chemical properties?

Answer 3

The change of one type of matter into another type (or the inability to change)

• flammability
• toxicity
• acidity
• reactivity (many types), and heat of combustion

Question 4

what is a chemical change?

Answer 4

A chemical change always produces one or more types of matter that differ from the matter present before the change.

Question 5

what is an extensive property?

Answer 5

If the property depends on the amount of matter present, it is an extensive property.

• The mass and volume of a substance

Question 6

what is a intensive property

Answer 6

If the property of a sample of matter does not depend on the amount of matter present, it is an intensive property

• Temperature is an example of an intensive property