Physical and Chemical Properties and Changes

EX

EX

flammability, oxidation, creation of gas or solid precipate

EX

color, odor, taste, density

EX

7 liters of water, 56 kg of cake

EX

ice melts at 0 degrees C, lead has a density of 11.34 g/CM^3

Physical Change

Does not result in new substance

EX

if you melt ice you still have water that can be frozen back to ice

Chemical Changes

when two substances react, a new substance is formed

EX

burning paper or baking a cake

Matter

Anything that has mass and takes up space

Mass

How much physical "stuff" in a piece of matter

Weight

The gravitational pull on a piece of mass

Solid

Fixed volume and fixed shape

Gas

Will expand and can be compressed

Liquid

Fixed volume, takes shape of container.

Physical properties

characteristics that can be observed or measured without changing the substance.

Intensive properties

Type of physical property that does not depend on the amount of the given substance.

Extensive properties

Type of physical property that depends on how much of the substance you have.

Chemical Property

Characteristics that are revealed only when the composition of the substance changes through a chemical reaction.

Physical Change

Does not result in new substance.

Chemical Changes

when two substances react, a new substance is formed.