Thermodynamics (Part 1)

The System and The Surroundings

In Thermodynamics a system refers to that part of the universe in which observations are made and the remaining universe constitutes the surroundings. The surroundings include everything other than the system. The system and the surroundings together form the universe.

Types of Systems

The systems are classified according to the movement of matter and energy in or out of the system. The three types of systems are :-

1. Open System

In an open system, there is exchange of energy and matter between the system and the surroundings.

2. Closed System

In a closed system, there is no exchange of matter, but exchange of energy is possible between the system and the surroundings.

3. Isolated System

In an isolated system, there is no exchange of energy or matter between the system and the surroundings.