# Type of systems & Properties in Thermodynamics

Introduction:-

Thermodynamics is that branch of engineering- science which deal with the possessed by gases a

nd vapours. It also includes the conversation of this engineers thermodynamics processin term of heat and mechanical work and their relationship with properties of the system

Properties of a system :- the state of a system maybe identified by the certain reversible quantities volume, temperature, pressure and density etc. All the quantities which identify the state of a system are called its properties. Thermodynamics properties are divided into the following two classes.

Extensive properties:- the properties of the system whose value for the entire system is equal to the sum of their values for the individual part of the system are called extensive properties,
For example .. Total mass and Total energy of a system are extensive property.

Intensive properties:- the properties of the system whose value for the entire system is not equal to the sum of their values for the individual part of the system are called its intensive properties.
For example,.. Temperature, pressure and density intensive properties

Types of system in Thermodynamics:-

The thermodynamic system may be defined as a definite area or space where Some thermodynamics process take place. It may be noted that thermodynamic system has its boundaries and anything outside the boundary is is called it its surroundings. The Thermodynamics system may be classified into the following three groups

Closed system:- this is a system of fixed mass whose boundaries are determined by the space of the working substance occupied in it. In a closed system heat and work across the boundary of the system but there is no addition or loss of the original mass of the working substance. Does the mass of the working substance which comprised the system is fixed.

Open system:-  In this system the working substance cross the boundary of the system. The heat and work may also cross the boundary.

Isolated system:- it is a system of fixed mass and no heat or what was the boundary.