Properties may be further classified in the following way:

An **extensive variable** is one which depends on system
size. Examples include mass, volume.

While extensive variables are useful for characterizing the
*specific* system being analyzed.

An **intensive variable** is one which does not depend on
system size. Examples include temperature, pressure, density.

While it may not be immediately obvious, intensive variables
tell us *more* about the system than extensive variables. In
particular, the temperature and pressure are two of the most
critical intensive variables.

A **ratio** of extensive variables will yield an intensive
variable! (For example, mass/volume -- two extensive variables --
gives density, an intensive variable) This is one way to understand
why intensive variables "tell you more".

Distinguish between extensive and intensive thermodynamic properties