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°