Isolated Systems

Definition

An isolated system is one that does not exchange matter or energy with its surroundings. In reality, perfectly isolated systems don't exist but they are useful theoretical models in thermodynamics.

Related terms

Closed System:

A system that exchanges only energy but not matter with its surroundings.

Open System:

A system that freely exchanges both matter and energy with its surroundings.

Thermodynamics:

The study of heat transfer and changes involving heat.