States of Matter

The changes in matter

depend fundamentally on

the conditions of pressure

and temperature and are

determined by the

exchanges between

substances and the

environment around them.

Matter commonly exist in three

states:

Solid

Liquid

Gas

It is characterized by structural rigidity and

resistance to changes of shape or volume.

Solid

Characteristics of solid state:

Not recover their own way.

A solid can be broken into fragments.

They cannot be scratched by other objects softer.

They have definite shape and volume is constant.

Its density is very high, that is why it is said that they

are “heavier”.

Liquid

Is the only state with a

definite volume but no

fixed shape.

The density of a liquid is

usually close to that of a

solid, and much higher

than in a gas.

Characteristics of liquid state:

Its cohesion strength is regular.

A liquid is able to flow and take the shape of acontainer.

Some liquids resist compression, while otherscan be compressed.

Is fluent.

This state of matter is actually the leastcommon in the known universe.

Characteristics of gas state:

The gas molecules are almost free.

Gases occupy the total volume of the container.

So definite shape.

Can be compressed easily.

Kinetic-Molecular Theory

In the solid state it has aminimum of movement of theparticles.

In the liquid state the particlesvibrate in a certain spatialregion faster.

The gaseous state have thehigher kinetic energy.