Section 2.1 Properties Of Matter

What are some words that describe physical changes?

Boil, Freeze, Melt, Condense, Break, Split, Grind, Cut, and Crush

What is true about all physical changes that involve a change of state?

Classified as reversible or irreversible

Which substance is a yellow solid and melts at 115°C? a. sulfur b.chlorine c. gold d. copper

a. sulfur

Which of these terms is NOT a physical state of matter? a. water b. gas c. liquid d. solid

a. water

Liquid...

close, but free to flow

A physical change alters a given material without changing its chemical..

composition

Which of these is NOT a physical property? a. hardness b. color c. boiling point d. melting

d. melting

Extensive property

depends on the amount of matter in a sample

Intensive property

depends on the type of matter not the amount

True or False? All samples of a substance have different physical properties

false

True or False? The words gas and vapor can be used interchangeably

false

the _________ of an object is a measure of the amount of matter the object contains

mass

A physical property is a quality or condition of a substance that can be _______ or _______ without changing the substances composition

observed or measured

Solid..

packed tightly together

The term gas is limited to those substances that exist in the gaseous state at..

room temperature

What is the shape, volume, and compression of a solid, liquid, and gas?

solid: definite shape, definite volume, not easily compressed liquid: indefinite shape, definite volume, not easily compressed gas: indefinite shape, indefinite volume, easily compressed

Gas..

spaced relatively far apart

Matter that has a uniform and definite composition is called a

substance

What does vapor describe?

the gaseous state or a substance that is generically a liquid of solid at room temperature, as in water vapor

True or False? Physical properties can help a chemist identify a substance.

true

What is the melting point of bromine?

⁻⁷°